id stringlengths 9 13 | submitter stringlengths 1 64 ⌀ | authors stringlengths 5 22.9k | title stringlengths 4 245 | comments stringlengths 1 548 ⌀ | journal-ref stringlengths 4 362 ⌀ | doi stringlengths 12 82 ⌀ | report-no stringlengths 2 281 ⌀ | categories stringclasses 793
values | license stringclasses 9
values | orig_abstract stringlengths 24 1.95k | versions listlengths 1 30 | update_date stringlengths 10 10 | authors_parsed listlengths 1 1.74k | abstract stringlengths 21 1.95k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0808.1552 | Hongbao Zhang | Hongbao Zhang | Note on the thermal history of decoupled massive particles | JHEP style, 4 pages, to appear in CQG | Class.Quant.Grav.25:208001,2008 | 10.1088/0264-9381/25/20/208001 | null | gr-qc astro-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This note provides an alternative approach to the momentum decay and thermal
evolution of decoupled massive particles. Although the ingredients in our
results have been addressed in Ref.\cite{Weinberg}, the strategies employed
here are simpler, and the results obtained here are more general.
| [
{
"created": "Mon, 11 Aug 2008 18:25:30 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Zhang",
"Hongbao",
""
]
] | This note provides an alternative approach to the momentum decay and thermal evolution of decoupled massive particles. Although the ingredients in our results have been addressed in Ref.\cite{Weinberg}, the strategies employed here are simpler, and the results obtained here are more general. |
2103.09870 | Leonardo Gualtieri | Lorenzo Pierini, Leonardo Gualtieri | Quasi-normal modes of rotating black holes in Einstein-dilaton
Gauss-Bonnet gravity: the first order in rotation | 13 pages, 3 figures, 1 table. Typos corrected and references added | Phys. Rev. D 103, 124017 (2021) | 10.1103/PhysRevD.103.124017 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Gravitational spectroscopy - the measurement of the quasi-normal modes of a
black hole from the ringdown signal of a binary black hole coalescence - is one
of the most promising tools to test gravity in the strong-field,
large-curvature regime, but without the knowledge of the black hole
quasi-normal modes in specifi... | [
{
"created": "Wed, 17 Mar 2021 19:15:06 GMT",
"version": "v1"
},
{
"created": "Tue, 23 Mar 2021 17:58:28 GMT",
"version": "v2"
}
] | 2021-06-16 | [
[
"Pierini",
"Lorenzo",
""
],
[
"Gualtieri",
"Leonardo",
""
]
] | Gravitational spectroscopy - the measurement of the quasi-normal modes of a black hole from the ringdown signal of a binary black hole coalescence - is one of the most promising tools to test gravity in the strong-field, large-curvature regime, but without the knowledge of the black hole quasi-normal modes in specific ... |
gr-qc/0608005 | Ngangbam Ibohal | Ng Ibohal | Non-stationary de Sitter cosmological models | 11 pages, Latex. International Journal of Modern Physics D (accepted
for publication) | Int.J.Mod.Phys.D18:853-863,2009 | 10.1142/S0218271809014807 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this note it is proposed a class of non-stationary de Sitter, rotating and
non-rotating, solutions of Einstein's field equations with a cosmological term
of variable function.
| [
{
"created": "Tue, 1 Aug 2006 09:33:17 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Jan 2009 04:42:21 GMT",
"version": "v2"
}
] | 2009-07-22 | [
[
"Ibohal",
"Ng",
""
]
] | In this note it is proposed a class of non-stationary de Sitter, rotating and non-rotating, solutions of Einstein's field equations with a cosmological term of variable function. |
1401.7544 | Eduardo Bittencourt | E. Bittencourt, V. A. De Lorenci, R. Klippert, M. Novello and J. M.
Salim | Analogue black holes for light rays in static dielectrics | 5 pages, 1 figure | Class. Quantum Grav. 31 145007 (2014) | 10.1088/0264-9381/31/14/145007 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Propagation of light in nonlinear materials is here studied in the regime of
the geometrical optics. It is shown that a spherically symmetric medium at rest
with some specific dielectric properties can be used to produce an exact
analogue model for a class of space-times which includes spherically symmetric
and stati... | [
{
"created": "Tue, 28 Jan 2014 09:50:37 GMT",
"version": "v1"
}
] | 2015-02-17 | [
[
"Bittencourt",
"E.",
""
],
[
"De Lorenci",
"V. A.",
""
],
[
"Klippert",
"R.",
""
],
[
"Novello",
"M.",
""
],
[
"Salim",
"J. M.",
""
]
] | Propagation of light in nonlinear materials is here studied in the regime of the geometrical optics. It is shown that a spherically symmetric medium at rest with some specific dielectric properties can be used to produce an exact analogue model for a class of space-times which includes spherically symmetric and static ... |
1506.04164 | Babak Vakili | V. Hosseinzadeh, M. A. Gorji, K. Nozari and B. Vakili | Noncommutative spaces and covariant formulation of statistical mechanics | 12 two column pages, 2 figures, Final version | Phys. Rev. D 92 (2015) 025008 | 10.1103/PhysRevD.92.025008 | null | gr-qc cond-mat.stat-mech hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the statistical mechanics of a general Hamiltonian system in the
context of symplectic structure of the corresponding phase space. This
covariant formalism reveals some interesting correspondences between properties
of the phase space and the associated statistical physics. While topology, as a
global proper... | [
{
"created": "Fri, 12 Jun 2015 20:14:33 GMT",
"version": "v1"
},
{
"created": "Thu, 9 Jul 2015 10:10:57 GMT",
"version": "v2"
}
] | 2015-07-10 | [
[
"Hosseinzadeh",
"V.",
""
],
[
"Gorji",
"M. A.",
""
],
[
"Nozari",
"K.",
""
],
[
"Vakili",
"B.",
""
]
] | We study the statistical mechanics of a general Hamiltonian system in the context of symplectic structure of the corresponding phase space. This covariant formalism reveals some interesting correspondences between properties of the phase space and the associated statistical physics. While topology, as a global property... |
0707.4665 | Peter K.F. Kuhfittig | Peter K. F. Kuhfittig | Wormholes with a space- and time-dependent equation of state | 6 pages RevTeX 4 | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The discovery that the Universe is undergoing an accelerated expansion has
suggested the existence of an evolving equation of state. This paper discusses
various wormhole solutions in a spherically symmetric spacetime with an
equation of state that is both space and time dependent. The solutions obtained
are exact an... | [
{
"created": "Tue, 31 Jul 2007 18:01:22 GMT",
"version": "v1"
},
{
"created": "Mon, 14 Mar 2011 17:27:09 GMT",
"version": "v2"
}
] | 2011-03-15 | [
[
"Kuhfittig",
"Peter K. F.",
""
]
] | The discovery that the Universe is undergoing an accelerated expansion has suggested the existence of an evolving equation of state. This paper discusses various wormhole solutions in a spherically symmetric spacetime with an equation of state that is both space and time dependent. The solutions obtained are exact and ... |
1006.1294 | Carlo Rovelli | You Ding, Carlo Rovelli | Physical boundary Hilbert space and volume operator in the Lorentzian
new spin-foam theory | 11 pages | Class.Quant.Grav.27:205003,2010 | 10.1088/0264-9381/27/20/205003 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A covariant spin-foam formulation of quantum gravity has been recently
developed, characterized by a kinematics which appears to match well the one of
canonical loop quantum gravity. In this paper we reconsider the implementation
of the constraints that defines the model. We define in a simple way the
boundary Hilber... | [
{
"created": "Mon, 7 Jun 2010 16:41:29 GMT",
"version": "v1"
},
{
"created": "Tue, 8 Jun 2010 15:07:04 GMT",
"version": "v2"
},
{
"created": "Thu, 10 Jun 2010 16:16:24 GMT",
"version": "v3"
}
] | 2014-11-21 | [
[
"Ding",
"You",
""
],
[
"Rovelli",
"Carlo",
""
]
] | A covariant spin-foam formulation of quantum gravity has been recently developed, characterized by a kinematics which appears to match well the one of canonical loop quantum gravity. In this paper we reconsider the implementation of the constraints that defines the model. We define in a simple way the boundary Hilbert ... |
2105.13983 | Do\u{g}a Veske | Do\u{g}a Veske, Imre Bartos, Zsuzsa M\'arka, Szabolcs M\'arka | Characterizing the observation bias in gravitational-wave detections and
finding structured population properties | Accepted to ApJ. 8 pages, 3 figures + 2 page appendix | null | 10.3847/1538-4357/ac27ac | null | gr-qc astro-ph.HE astro-ph.IM | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The observed distributions of the source properties from gravitational-wave
detections are biased due to the selection effects and detection criteria in
the detections, analogous to the Malmquist bias. In this work, this observation
bias is investigated through its fundamental statistical and physical origins.
An eff... | [
{
"created": "Fri, 28 May 2021 17:08:04 GMT",
"version": "v1"
},
{
"created": "Tue, 12 Oct 2021 17:09:19 GMT",
"version": "v2"
}
] | 2021-12-15 | [
[
"Veske",
"Doğa",
""
],
[
"Bartos",
"Imre",
""
],
[
"Márka",
"Zsuzsa",
""
],
[
"Márka",
"Szabolcs",
""
]
] | The observed distributions of the source properties from gravitational-wave detections are biased due to the selection effects and detection criteria in the detections, analogous to the Malmquist bias. In this work, this observation bias is investigated through its fundamental statistical and physical origins. An effic... |
gr-qc/0701052 | Daniel Alonso | Daniel Alonso, Antonia Ruiz and Manuel S\'anchez-Hern\'andez | Escape of photons from two fixed extreme Reissner-Nordstr\"om black
holes | Final version | Phys.Rev.D78:104024,2008 | 10.1103/PhysRevD.78.104024 | null | gr-qc nlin.CD | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the scattering of light (null geodesics) by two fixed extreme
Reissner-Nordstr\"om black holes, in which the gravitational attraction of
their masses is exactly balanced with the electrostatic repulsion of their
charges, allowing a static spacetime. We identify the set of unstable periodic
orbits that consti... | [
{
"created": "Tue, 9 Jan 2007 15:57:37 GMT",
"version": "v1"
},
{
"created": "Thu, 20 Nov 2008 12:11:29 GMT",
"version": "v2"
}
] | 2009-02-23 | [
[
"Alonso",
"Daniel",
""
],
[
"Ruiz",
"Antonia",
""
],
[
"Sánchez-Hernández",
"Manuel",
""
]
] | We study the scattering of light (null geodesics) by two fixed extreme Reissner-Nordstr\"om black holes, in which the gravitational attraction of their masses is exactly balanced with the electrostatic repulsion of their charges, allowing a static spacetime. We identify the set of unstable periodic orbits that constitu... |
1612.08222 | Krzysztof Bolejko | Krzysztof Bolejko, and Miko{\l}aj Korzy\'nski | Inhomogeneous cosmology and backreaction: Current status and future
prospects | A review article that includes a survey of 50 academics and their
opinions; 24 pages and 3 figures with survey results; v3 - matches published
version | Int. J. Mod. Phys. D 26, 1730011 (2017) | 10.1142/S0218271817300117 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Astronomical observations reveal hierarchical structures in the Universe,
from galaxies, groups of galaxies, clusters and superclusters, to filaments and
voids. On the largest scales it seems that some kind of statistical homogeneity
can be observed. As a result, modern cosmological models are based on spatially
homo... | [
{
"created": "Sat, 24 Dec 2016 22:16:18 GMT",
"version": "v1"
},
{
"created": "Mon, 2 Jan 2017 23:01:08 GMT",
"version": "v2"
},
{
"created": "Mon, 22 May 2017 13:36:44 GMT",
"version": "v3"
}
] | 2017-05-23 | [
[
"Bolejko",
"Krzysztof",
""
],
[
"Korzyński",
"Mikołaj",
""
]
] | Astronomical observations reveal hierarchical structures in the Universe, from galaxies, groups of galaxies, clusters and superclusters, to filaments and voids. On the largest scales it seems that some kind of statistical homogeneity can be observed. As a result, modern cosmological models are based on spatially homoge... |
1507.07314 | Chandra Prakash Singh | C. P. Singh and Pankaj Kumar | Holographic dark energy models with statefinder diagnostic in modified
$f(R,T)$ gravity | 12 pages, 4 figures, MS has been revised | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study non-viscous and viscous holographic dark energy models for a
homogeneous and isotropic flat Friedmann-Robertson-Walker Universe in $f(R,T)$
gravity. We find that the Hubble horizon as an IR cut-off is suitable for both
the models to explain the recent accelerated expansion of the Universe. The
cosmological p... | [
{
"created": "Mon, 27 Jul 2015 06:55:22 GMT",
"version": "v1"
},
{
"created": "Wed, 14 Oct 2015 06:51:22 GMT",
"version": "v2"
}
] | 2015-10-15 | [
[
"Singh",
"C. P.",
""
],
[
"Kumar",
"Pankaj",
""
]
] | We study non-viscous and viscous holographic dark energy models for a homogeneous and isotropic flat Friedmann-Robertson-Walker Universe in $f(R,T)$ gravity. We find that the Hubble horizon as an IR cut-off is suitable for both the models to explain the recent accelerated expansion of the Universe. The cosmological par... |
1503.07060 | Oleg Tsupko | Paul I. Jefremov, Oleg Yu. Tsupko, and Gennady S. Bisnovatyi-Kogan | Innermost stable circular orbits of spinning test particles in
Schwarzschild and Kerr space-times | accepted to PhysRevD, 15 pages, 5 figures | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We consider the motion of classical spinning test particles in Schwarzschild
and Kerr metrics and investigate innermost stable circular orbits (ISCO). The
main goal of this work is to find analytically the small-spin corrections for
the parameters of ISCO (radius, total angular momentum, energy, orbital angular
frequ... | [
{
"created": "Tue, 24 Mar 2015 14:38:29 GMT",
"version": "v1"
},
{
"created": "Fri, 22 May 2015 09:29:41 GMT",
"version": "v2"
}
] | 2015-05-25 | [
[
"Jefremov",
"Paul I.",
""
],
[
"Tsupko",
"Oleg Yu.",
""
],
[
"Bisnovatyi-Kogan",
"Gennady S.",
""
]
] | We consider the motion of classical spinning test particles in Schwarzschild and Kerr metrics and investigate innermost stable circular orbits (ISCO). The main goal of this work is to find analytically the small-spin corrections for the parameters of ISCO (radius, total angular momentum, energy, orbital angular frequen... |
0804.1036 | Andreas Freise | A. Freise, S. Chelkowski, S. Hild, W. Del Pozzo, A. Perreca and A.
Vecchio | Triple Michelson Interferometer for a Third-Generation Gravitational
Wave Detector | Minor corrections to the main text and two additional appendices. 14
pages, 6 figures | null | 10.1088/0264-9381/26/8/085012 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The upcoming European design study `Einstein gravitational-wave Telescope'
represents the first step towards a substantial, international effort for the
design of a third-generation interferometric gravitational wave detector. It is
generally believed that third-generation instruments might not be installed
into exis... | [
{
"created": "Mon, 7 Apr 2008 14:22:54 GMT",
"version": "v1"
},
{
"created": "Thu, 5 Mar 2009 05:23:20 GMT",
"version": "v2"
}
] | 2009-11-13 | [
[
"Freise",
"A.",
""
],
[
"Chelkowski",
"S.",
""
],
[
"Hild",
"S.",
""
],
[
"Del Pozzo",
"W.",
""
],
[
"Perreca",
"A.",
""
],
[
"Vecchio",
"A.",
""
]
] | The upcoming European design study `Einstein gravitational-wave Telescope' represents the first step towards a substantial, international effort for the design of a third-generation interferometric gravitational wave detector. It is generally believed that third-generation instruments might not be installed into existi... |
1208.3184 | Mahmood Roshan | Mahmood Roshan | Parametrized post-Newtonian virial theorem | 10 pages, submitted to CQG | Class. Quantum Grav. 29 (2012) 215001 | 10.1088/0264-9381/29/21/215001 | IPM-P-2012-037 | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Using the parametrized post-Newtonian equations of hydrodynamics, we derive
the tensor form of the parametrized post-Newtonian virial theorem.
| [
{
"created": "Wed, 15 Aug 2012 19:30:35 GMT",
"version": "v1"
}
] | 2012-10-16 | [
[
"Roshan",
"Mahmood",
""
]
] | Using the parametrized post-Newtonian equations of hydrodynamics, we derive the tensor form of the parametrized post-Newtonian virial theorem. |
2010.13495 | Alireza Talebian Ashkezari | Seyed Ali Hosseini Mansoori, Alireza Talebian and Hassan Firouzjahi | Mimetic Inflation | 19+9 pages, 29 figures, 2 appendices. Accepted by JHEP | null | 10.1007/JHEP01(2021)183 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study inflationary solution in an extension of mimetic gravity with the
higher derivative interactions coupled to gravity. Because of the higher
derivative interactions, the setup is free from the ghost and gradient
instabilities while it hosts a number of novel properties. The dispersion
relation of scalar pertur... | [
{
"created": "Mon, 26 Oct 2020 11:36:10 GMT",
"version": "v1"
},
{
"created": "Thu, 29 Oct 2020 11:43:03 GMT",
"version": "v2"
},
{
"created": "Thu, 24 Dec 2020 15:18:52 GMT",
"version": "v3"
}
] | 2021-02-24 | [
[
"Mansoori",
"Seyed Ali Hosseini",
""
],
[
"Talebian",
"Alireza",
""
],
[
"Firouzjahi",
"Hassan",
""
]
] | We study inflationary solution in an extension of mimetic gravity with the higher derivative interactions coupled to gravity. Because of the higher derivative interactions, the setup is free from the ghost and gradient instabilities while it hosts a number of novel properties. The dispersion relation of scalar perturba... |
1711.04167 | Ingrid Irmer | Ingrid Irmer | Examples of covering properties of boundary points of space-times | null | null | 10.1142/S021988781850192X | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The problem of classifying boundary points of space-time, for example
singularities, regular points and points at infinity, is an unexpectedly subtle
one. Due to the fact that whether or not two boundary points are identified or
even "nearby" is dependant on the way the space-time is embedded, difficulties
occur when... | [
{
"created": "Sat, 11 Nov 2017 16:38:38 GMT",
"version": "v1"
}
] | 2018-11-14 | [
[
"Irmer",
"Ingrid",
""
]
] | The problem of classifying boundary points of space-time, for example singularities, regular points and points at infinity, is an unexpectedly subtle one. Due to the fact that whether or not two boundary points are identified or even "nearby" is dependant on the way the space-time is embedded, difficulties occur when s... |
1609.06398 | F. S. Guzman | M. Gracia-Linares and F. S. Guzman | Accretion of Supersonic Winds on Boson Stars | 8 pages, 10 pdf figures. Accepted for publication in Physical Review
D | Phys. Rev. D 94, 064077 (2016) | 10.1103/PhysRevD.94.064077 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present the evolution of a supersonic wind interacting with a Boson Star
(BS) and compare the resulting wind density profile with that of the shock cone
formed when the wind is accreted by a non-rotating Black Hole (BH) of the same
mass. The physical differences between these accretors are that a BS, unlike a
BH h... | [
{
"created": "Wed, 21 Sep 2016 01:43:05 GMT",
"version": "v1"
}
] | 2016-10-14 | [
[
"Gracia-Linares",
"M.",
""
],
[
"Guzman",
"F. S.",
""
]
] | We present the evolution of a supersonic wind interacting with a Boson Star (BS) and compare the resulting wind density profile with that of the shock cone formed when the wind is accreted by a non-rotating Black Hole (BH) of the same mass. The physical differences between these accretors are that a BS, unlike a BH has... |
1212.3417 | Salvador Robles-Perez | S. J. Robles-P\'erez and P. F. Gonz\'alez-D\'iaz | Inter-universal quantum entanglement | 3 pages, no figure. Prepared for the proceedings of the "Thirteenth
Marcel Grossmann Meeting" | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The boundary conditions to be imposed on the quantum state of the whole
multiverse could be such that the universes would be created in entangled
pairs. Then, inter-universal entanglement would provide us with a vacuum energy
for each single universe that might be fitted with observational data, making
testable not o... | [
{
"created": "Fri, 14 Dec 2012 09:15:01 GMT",
"version": "v1"
}
] | 2012-12-17 | [
[
"Robles-Pérez",
"S. J.",
""
],
[
"González-Díaz",
"P. F.",
""
]
] | The boundary conditions to be imposed on the quantum state of the whole multiverse could be such that the universes would be created in entangled pairs. Then, inter-universal entanglement would provide us with a vacuum energy for each single universe that might be fitted with observational data, making testable not onl... |
2403.08250 | Camilo Posada PhD | Philip Beltracchi and Camilo Posada | Slowly rotating anisotropic relativistic stars | 27 pages, 30 figures. Discussion in Appendix B extended. Matches the
published version in PRD | Phys. Rev. D 110, 024052 (2024) | 10.1103/PhysRevD.110.024052 | null | gr-qc astro-ph.SR | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The present paper is devoted to a study of the equilibrium configurations of
slowly rotating anisotropic stars in the framework of general relativity. For
that purpose, we provide the equations of structure where the rotation is
treated to second order in the angular velocity. These equations extend those
first deriv... | [
{
"created": "Wed, 13 Mar 2024 05:07:01 GMT",
"version": "v1"
},
{
"created": "Mon, 22 Jul 2024 15:55:43 GMT",
"version": "v2"
}
] | 2024-07-23 | [
[
"Beltracchi",
"Philip",
""
],
[
"Posada",
"Camilo",
""
]
] | The present paper is devoted to a study of the equilibrium configurations of slowly rotating anisotropic stars in the framework of general relativity. For that purpose, we provide the equations of structure where the rotation is treated to second order in the angular velocity. These equations extend those first derived... |
2010.14578 | Lu\'is Felipe Longo Micchi Mr. | Luis Felipe Longo Micchi, Niayesh Afshordi, Cecilia Chirenti | How loud are echoes from exotic compact objects? | 15 pages, 9 figures, minor changes, accepted for publication in PRD | Phys. Rev. D 103, 044028 (2021) | 10.1103/PhysRevD.103.044028 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The first direct observations of gravitational waves (GWs) by the LIGO
collaboration have motivated different tests of General Relativity (GR),
including the search for extra pulses following the GR waveform for the
coalescence of compact objects. The motivation for these searches comes from
the alternative proposal ... | [
{
"created": "Tue, 27 Oct 2020 19:40:43 GMT",
"version": "v1"
},
{
"created": "Wed, 13 Jan 2021 18:38:36 GMT",
"version": "v2"
}
] | 2021-02-22 | [
[
"Micchi",
"Luis Felipe Longo",
""
],
[
"Afshordi",
"Niayesh",
""
],
[
"Chirenti",
"Cecilia",
""
]
] | The first direct observations of gravitational waves (GWs) by the LIGO collaboration have motivated different tests of General Relativity (GR), including the search for extra pulses following the GR waveform for the coalescence of compact objects. The motivation for these searches comes from the alternative proposal th... |
1506.08699 | M. Farasat Shamir | M. Farasat Shamir | Bianchi Type $I$ Cosmology in $f(R,T)$ Gravity | 17 Pages, Extended analysis of arXiv:1207.0708 | J. Exp. Theor. Phys. 119(2): 242-250, 2014 | 10.1134/S1063776114070073 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper is devoted to investigate the exact solutions of Bianchi type $I$
spacetime in the context of $f(R,T)$ gravity [1], where $f(R,T)$ is an
arbitrary function of Ricci scalar $R$ and trace of the energy momentum tensor
$T$. For this purpose, we find two exact solutions using the assumption of
constant deceler... | [
{
"created": "Fri, 26 Jun 2015 19:12:56 GMT",
"version": "v1"
}
] | 2015-06-30 | [
[
"Shamir",
"M. Farasat",
""
]
] | This paper is devoted to investigate the exact solutions of Bianchi type $I$ spacetime in the context of $f(R,T)$ gravity [1], where $f(R,T)$ is an arbitrary function of Ricci scalar $R$ and trace of the energy momentum tensor $T$. For this purpose, we find two exact solutions using the assumption of constant decelerat... |
1508.06457 | Dennis Philipp | Dennis Philipp, Volker Perlick, Claus Laemmerzahl, Kaustubh Deshpande | On geodesic deviation in Schwarzschild spacetime | 6 pages, 3 figures, contribution to conference on Metrology for
Aerospace 2015 - relativistic metrology session | Metrology for Aerospace (MetroAeroSpace), 2015 IEEE, pp.198-203 | 10.1109/MetroAeroSpace.2015.7180653 | null | gr-qc astro-ph.EP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | For metrology, geodesy and gravimetry in space, satellite based instruments
and measurement techniques are used and the orbits of the satellites as well as
possible deviations between nearby ones are of central interest. The
measurement of this deviation itself gives insight into the underlying
structure of the space... | [
{
"created": "Wed, 26 Aug 2015 12:06:51 GMT",
"version": "v1"
}
] | 2015-08-27 | [
[
"Philipp",
"Dennis",
""
],
[
"Perlick",
"Volker",
""
],
[
"Laemmerzahl",
"Claus",
""
],
[
"Deshpande",
"Kaustubh",
""
]
] | For metrology, geodesy and gravimetry in space, satellite based instruments and measurement techniques are used and the orbits of the satellites as well as possible deviations between nearby ones are of central interest. The measurement of this deviation itself gives insight into the underlying structure of the spaceti... |
2111.01268 | Jibitesh Dutta | Wompherdeiki Khyllep, Jibitesh Dutta, Spyros Basilakos and Emmanuel N.
Saridakis | Background evolution and growth of structures in interacting dark energy
through dynamical system analysis | 13 pages, 5 figures, version to appear in Phys.Rev.D | Phys. Rev. D 105, 043511 (2022) | 10.1103/PhysRevD.105.043511 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We apply the formalism of dynamical system analysis to investigate the
evolution of interacting dark energy scenarios at the background and
perturbation levels in a unified way. Since the resulting dynamical system
contains the extra perturbation variable related to the matter overdensity, the
critical points of the ... | [
{
"created": "Mon, 1 Nov 2021 21:28:49 GMT",
"version": "v1"
},
{
"created": "Sun, 16 Jan 2022 08:11:06 GMT",
"version": "v2"
}
] | 2022-02-10 | [
[
"Khyllep",
"Wompherdeiki",
""
],
[
"Dutta",
"Jibitesh",
""
],
[
"Basilakos",
"Spyros",
""
],
[
"Saridakis",
"Emmanuel N.",
""
]
] | We apply the formalism of dynamical system analysis to investigate the evolution of interacting dark energy scenarios at the background and perturbation levels in a unified way. Since the resulting dynamical system contains the extra perturbation variable related to the matter overdensity, the critical points of the ba... |
2305.17942 | Tomohiro Kozuka | Shunichiro Kinoshita, Tomohiro Kozuka, Keiju Murata, Keita Sugawara | Quasinormal mode spectrum of the AdS black hole with the Robin boundary
condition | 24 pages, 10 figures. v2: published version, figures added | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the quasinormal mode (QNM) spectrum of an asymptotically AdS black
hole with the Robin boundary condition at infinity. We consider the
Schwarzshild-AdS$_4$ with the flat event horizon as the background spacetime
and study its scalar field perturbation. Denoting leading coefficients of slow-
and fast-decay mo... | [
{
"created": "Mon, 29 May 2023 08:05:55 GMT",
"version": "v1"
},
{
"created": "Mon, 26 Feb 2024 05:44:13 GMT",
"version": "v2"
}
] | 2024-02-27 | [
[
"Kinoshita",
"Shunichiro",
""
],
[
"Kozuka",
"Tomohiro",
""
],
[
"Murata",
"Keiju",
""
],
[
"Sugawara",
"Keita",
""
]
] | We study the quasinormal mode (QNM) spectrum of an asymptotically AdS black hole with the Robin boundary condition at infinity. We consider the Schwarzshild-AdS$_4$ with the flat event horizon as the background spacetime and study its scalar field perturbation. Denoting leading coefficients of slow- and fast-decay mode... |
1711.10890 | Martin Blaschke | Zden\v{e}k Stuchl\'ik, Martin Blaschke, Jan Schee | Particle collisions and optical effects in the mining Kerr--Newman
spacetimes | null | Phys. Rev. D 96, 104050, 28 November 2017 | 10.1103/PhysRevD.96.104050 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study ultra-high-energy particle collisions and optical effects in the
extraordinary class of mining braneworld Kerr-Newman (KN) naked singularity
spacetimes, predicting extremely high efficiency of Keplerian accretion, and
compare the results to those related to the other classes of the KN naked
singularity and b... | [
{
"created": "Wed, 29 Nov 2017 14:52:33 GMT",
"version": "v1"
}
] | 2017-11-30 | [
[
"Stuchlík",
"Zdeněk",
""
],
[
"Blaschke",
"Martin",
""
],
[
"Schee",
"Jan",
""
]
] | We study ultra-high-energy particle collisions and optical effects in the extraordinary class of mining braneworld Kerr-Newman (KN) naked singularity spacetimes, predicting extremely high efficiency of Keplerian accretion, and compare the results to those related to the other classes of the KN naked singularity and bla... |
2207.09034 | Matt Visser | Joshua Baines (Victoria University of Wellington) and Matt Visser
(Victoria University of Wellington) | Physically motivated ansatz for the Kerr spacetime | V1:19 pages; no figures. V2: one minor typo fixed; two new references | null | 10.1088/1361-6382/ac9bc5 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Despite some 60 years of work on the subject of the Kerr rotating black hole
there is as yet no widely accepted physically based and pedagogically viable
ansatz suitable for deriving the Kerr solution without significant
computational effort. (Typically involving computer-aided symbolic algebra.)
Perhaps the closest ... | [
{
"created": "Tue, 19 Jul 2022 02:51:51 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jul 2022 05:22:55 GMT",
"version": "v2"
}
] | 2022-11-23 | [
[
"Baines",
"Joshua",
"",
"Victoria University of Wellington"
],
[
"Visser",
"Matt",
"",
"Victoria University of Wellington"
]
] | Despite some 60 years of work on the subject of the Kerr rotating black hole there is as yet no widely accepted physically based and pedagogically viable ansatz suitable for deriving the Kerr solution without significant computational effort. (Typically involving computer-aided symbolic algebra.) Perhaps the closest on... |
1609.02287 | German Sharov | Supriya Pan and German S. Sharov | A model with interaction of dark components and recent observational
data | 16 pages, 5 figures, 4 tables; accepted for publication in Mon. Not.
Roy. Astron. Soc | null | 10.1093/mnras/stx2278 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In the proposed model with interaction between dark energy and dark matter,
we consider cosmological scenarios with different equations of state ($w_d$)
for dark energy. For both constant and variable equation of state, we analyze
solutions for dark energy and dark matter in seven variants of the model. We
investigat... | [
{
"created": "Thu, 8 Sep 2016 06:36:06 GMT",
"version": "v1"
},
{
"created": "Thu, 21 Sep 2017 08:32:50 GMT",
"version": "v2"
}
] | 2017-10-18 | [
[
"Pan",
"Supriya",
""
],
[
"Sharov",
"German S.",
""
]
] | In the proposed model with interaction between dark energy and dark matter, we consider cosmological scenarios with different equations of state ($w_d$) for dark energy. For both constant and variable equation of state, we analyze solutions for dark energy and dark matter in seven variants of the model. We investigate ... |
2112.07808 | Karen Yagdjian | Karen Yagdjian | Huygens' principle for the spin-1/2 particle in spacetime of
non-constant curvature | null | null | null | null | gr-qc math-ph math.AP math.MP | http://creativecommons.org/licenses/by/4.0/ | In this article we give sufficient and necessary conditions for the validity
of the Huygens' principle for the Dirac operator in the non-constant curvature
spacetime of the Friedmann-Lema\^itre-Robertson-Walker models of cosmology. The
Huygens' principle discussed for the equation of a particle with mass $m=0$ as
wel... | [
{
"created": "Wed, 15 Dec 2021 00:25:34 GMT",
"version": "v1"
},
{
"created": "Sat, 25 Dec 2021 18:35:13 GMT",
"version": "v2"
},
{
"created": "Thu, 21 Jul 2022 19:34:55 GMT",
"version": "v3"
}
] | 2022-07-25 | [
[
"Yagdjian",
"Karen",
""
]
] | In this article we give sufficient and necessary conditions for the validity of the Huygens' principle for the Dirac operator in the non-constant curvature spacetime of the Friedmann-Lema\^itre-Robertson-Walker models of cosmology. The Huygens' principle discussed for the equation of a particle with mass $m=0$ as well ... |
1104.3180 | Yun Soo Myung | Yun Soo Myung | Instability of rotating black hole in a limited form of $f(R)$ gravity | 14 pages, no figure, title changed slightly, version to appear in PRD | Phys.Rev.D84:024048,2011 | 10.1103/PhysRevD.84.024048 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the stability of $f(R)$-rotating (Kerr) black hole obtained
from a limited form of $f(R)$ gravity. In order to avoid the difficulty of
handling fourth order linearized equations, we transform this form of $f(R)$
gravity into the scalar-tensor theory by introducing two auxiliary scalars. In
this case, t... | [
{
"created": "Sat, 16 Apr 2011 00:26:11 GMT",
"version": "v1"
},
{
"created": "Tue, 28 Jun 2011 22:19:49 GMT",
"version": "v2"
}
] | 2011-08-12 | [
[
"Myung",
"Yun Soo",
""
]
] | We investigate the stability of $f(R)$-rotating (Kerr) black hole obtained from a limited form of $f(R)$ gravity. In order to avoid the difficulty of handling fourth order linearized equations, we transform this form of $f(R)$ gravity into the scalar-tensor theory by introducing two auxiliary scalars. In this case, the... |
gr-qc/0506136 | Warren G. Anderson | Warren G. Anderson and Alan G. Wiseman | A matched expansion approach to practical self-force calculations | IOP style, 8 eps figures, accepted for publication in a special issue
of Classical and Quantum Gravity | Class.Quant.Grav. 22 (2005) S783-S800 | 10.1088/0264-9381/22/15/010 | null | gr-qc | null | We discuss a practical method to compute the self-force on a particle moving
through a curved spacetime. This method involves two expansions to calculate
the self-force, one arising from the particle's immediate past and the other
from the more distant past. The expansion in the immediate past is a covariant
Taylor s... | [
{
"created": "Wed, 29 Jun 2005 16:14:00 GMT",
"version": "v1"
}
] | 2009-11-11 | [
[
"Anderson",
"Warren G.",
""
],
[
"Wiseman",
"Alan G.",
""
]
] | We discuss a practical method to compute the self-force on a particle moving through a curved spacetime. This method involves two expansions to calculate the self-force, one arising from the particle's immediate past and the other from the more distant past. The expansion in the immediate past is a covariant Taylor ser... |
0802.3335 | Burkhard Kleihaus | Rustam Ibadov, Burkhard Kleihaus, Jutta Kunz and Michael Leissner | Gravitating Sphaleron-Antisphaleron Systems | 7 pages, 3 figures | Phys.Lett.B663:136-140,2008 | 10.1016/j.physletb.2008.03.055 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We present new classical solutions of Einstein-Yang-Mills-Higgs theory,
representing gravitating sphaleron-antisphaleron pair, chain and vortex ring
solutions. In these static axially symmetric solutions, the Higgs field
vanishes on isolated points on the symmetry axis, or on rings centered around
the symmetry axis. ... | [
{
"created": "Fri, 22 Feb 2008 15:16:06 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Ibadov",
"Rustam",
""
],
[
"Kleihaus",
"Burkhard",
""
],
[
"Kunz",
"Jutta",
""
],
[
"Leissner",
"Michael",
""
]
] | We present new classical solutions of Einstein-Yang-Mills-Higgs theory, representing gravitating sphaleron-antisphaleron pair, chain and vortex ring solutions. In these static axially symmetric solutions, the Higgs field vanishes on isolated points on the symmetry axis, or on rings centered around the symmetry axis. We... |
gr-qc/9506090 | null | Giampiero Esposito | Alpha Surfaces for Complex Space-Times with Torsion | 7 pages, plain-tex, published in Nuovo Cimento B, volume 108, pages
123-125, year 1993 | NuovoCim.B108:123-126,1993 | 10.1007/BF02874404 | DSF 91/20 | gr-qc | null | This paper studies necessary conditions for the existence of alpha-surfaces
in complex space-time manifolds with nonvanishing torsion. For these manifolds,
Lie brackets of vector fields and spinor Ricci identities contain explicitly
the effects of torsion. This leads to an integrability condition for
alpha-surfaces w... | [
{
"created": "Sat, 1 Jul 1995 20:03:10 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Esposito",
"Giampiero",
""
]
] | This paper studies necessary conditions for the existence of alpha-surfaces in complex space-time manifolds with nonvanishing torsion. For these manifolds, Lie brackets of vector fields and spinor Ricci identities contain explicitly the effects of torsion. This leads to an integrability condition for alpha-surfaces whi... |
2308.01179 | Clare Burrage | Kate Clements and Benjamin Elder and Lucia Hackermueller and Mark
Fromhold and Clare Burrage | Detecting Dark Domain Walls | 8 pages, 3 figures | null | null | null | gr-qc astro-ph.CO hep-ex quant-ph | http://creativecommons.org/licenses/by/4.0/ | Light scalar fields, with double well potentials and direct matter couplings,
undergo density driven phase transitions, leading to the formation of domain
walls. Such theories could explain dark energy, dark matter or source the
nanoHz gravitational-wave background. We describe an experiment that could be
used to det... | [
{
"created": "Wed, 2 Aug 2023 14:39:50 GMT",
"version": "v1"
}
] | 2023-08-03 | [
[
"Clements",
"Kate",
""
],
[
"Elder",
"Benjamin",
""
],
[
"Hackermueller",
"Lucia",
""
],
[
"Fromhold",
"Mark",
""
],
[
"Burrage",
"Clare",
""
]
] | Light scalar fields, with double well potentials and direct matter couplings, undergo density driven phase transitions, leading to the formation of domain walls. Such theories could explain dark energy, dark matter or source the nanoHz gravitational-wave background. We describe an experiment that could be used to detec... |
2308.05573 | Bayram Tekin | Zeynep Tugce Ozkarsligil, Bayram Tekin | A Systematic Construction of Kastor-Traschen Currents and their
Extensions to Generic Powers of Curvature | 11 pages, v2 matches the published version | Phys.Rev.D 108 (2023) 8, 084050 | 10.1103/PhysRevD.108.084050 | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Kastor and Traschen constructed totally anti-symmetric conserved currents
that are linear in the Riemann curvature in spacetimes admitting Killing-Yano
tensors. The construction does not refer to any field equations and is built on
the algebraic and differential symmetries of the Riemann tensor as well as on
the Kill... | [
{
"created": "Thu, 10 Aug 2023 13:36:57 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Oct 2023 12:48:35 GMT",
"version": "v2"
}
] | 2023-11-01 | [
[
"Ozkarsligil",
"Zeynep Tugce",
""
],
[
"Tekin",
"Bayram",
""
]
] | Kastor and Traschen constructed totally anti-symmetric conserved currents that are linear in the Riemann curvature in spacetimes admitting Killing-Yano tensors. The construction does not refer to any field equations and is built on the algebraic and differential symmetries of the Riemann tensor as well as on the Killin... |
1007.4126 | Christian Corda cordac | Christian Corda | Presentation of the Second Big Challenge Symposium - The Big Challenge
of Cosmological Understanding: Gravitation, Dark Matter and Dark Energy.
Towards New Scenarios | To appear in the AIP Proceedings of the 8th International Conference
of Numerical Analysis and Applied Mathematics, Hotel Rodos Palace, Rhodes,
Greece, 1925 September 2010 | AIP Conf. Proc. 1281:845,2010 | 10.1063/1.3498619 | null | gr-qc math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This Symposium is devoted to the Memory of Lev Kofman,
June-17-1957-November-12-2009.
The accelerated expansion of the Universe, which is today observed, shows
that cosmological dynamics is dominated by the so-called Dark Energy field
which provides a large negative pressure. This is the standard picture, in
which ... | [
{
"created": "Fri, 23 Jul 2010 13:33:24 GMT",
"version": "v1"
}
] | 2015-05-19 | [
[
"Corda",
"Christian",
""
]
] | This Symposium is devoted to the Memory of Lev Kofman, June-17-1957-November-12-2009. The accelerated expansion of the Universe, which is today observed, shows that cosmological dynamics is dominated by the so-called Dark Energy field which provides a large negative pressure. This is the standard picture, in which such... |
gr-qc/0408071 | Brian Edgar | S. Brian Edgar and Jos\'e M. M. Senovilla | A local potential for the Weyl tensor in all dimensions | 7 pages; Latex | Class.Quant.Grav. 21 (2004) L133 | 10.1088/0264-9381/21/22/L01 | null | gr-qc math-ph math.DG math.MP | null | In all dimensions and arbitrary signature, we demonstrate the existence of a
new local potential -- a double (2,3)-form -- for the Weyl curvature tensor,
and more generally for all tensors with the symmetry properties of the Weyl
curvature tensor. The classical four-dimensional Lanczos potential for a Weyl
tensor -- ... | [
{
"created": "Fri, 20 Aug 2004 12:03:50 GMT",
"version": "v1"
}
] | 2016-08-16 | [
[
"Edgar",
"S. Brian",
""
],
[
"Senovilla",
"José M. M.",
""
]
] | In all dimensions and arbitrary signature, we demonstrate the existence of a new local potential -- a double (2,3)-form -- for the Weyl curvature tensor, and more generally for all tensors with the symmetry properties of the Weyl curvature tensor. The classical four-dimensional Lanczos potential for a Weyl tensor -- a ... |
gr-qc/0310005 | Maciej Dunajski | Maciej Dunajski, Maciej Przanowski | Null K\"ahler structures, Symmetries and Integrability | Text of a talk given at the conference on "Mathematical Physics,
General Relativity and Cosmology", held in honour of Professor Jerzy
Plebanski. To appear in the Proceedings | Topics in Mathematical Physics, General Relativity and Cosmology
in Honor of Jerzy Plebanski, ed. Hugo Garcia-Compean, Bogdan Mielnik, Merced
Montesinos & Maciej Przanowski. World Scientific 2006. | null | DAMTP-2003-74 | gr-qc hep-th math-ph math.MP nlin.SI | null | We review the integrable systems which arise as symmetry reductions of
Plebanski's heavenly equations, and their generalisations. We also show that
all four-dimensional null Kahler-Einstein (or type N hyper-heavenly) metrics
with symmetry can be found from solutions to a variable coefficient
generalisation of the dis... | [
{
"created": "Wed, 1 Oct 2003 15:30:35 GMT",
"version": "v1"
},
{
"created": "Thu, 22 Jul 2004 02:25:31 GMT",
"version": "v2"
},
{
"created": "Wed, 21 Jun 2006 11:59:10 GMT",
"version": "v3"
}
] | 2007-05-23 | [
[
"Dunajski",
"Maciej",
""
],
[
"Przanowski",
"Maciej",
""
]
] | We review the integrable systems which arise as symmetry reductions of Plebanski's heavenly equations, and their generalisations. We also show that all four-dimensional null Kahler-Einstein (or type N hyper-heavenly) metrics with symmetry can be found from solutions to a variable coefficient generalisation of the dispe... |
gr-qc/9209010 | Sam Finn | Lee Samuel Finn | Detection, Measurement and Gravitational Radiation | 37 pages (plus 6 figures), LaTeX/REVTEX | Phys.Rev.D46:5236-5249,1992 | 10.1103/PhysRevD.46.5236 | NU-GR-1 | gr-qc astro-ph | null | Here I examine how to determine the sensitivity of the LIGO, VIRGO, and LAGOS
gravitational wave detectors to sources of gravitational radiation by
considering the process by which data are analyzed in a noisy detector. By
constructing the probability that the detector output is consistent with the
presence of a sign... | [
{
"created": "Thu, 24 Sep 1992 16:36:00 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Finn",
"Lee Samuel",
""
]
] | Here I examine how to determine the sensitivity of the LIGO, VIRGO, and LAGOS gravitational wave detectors to sources of gravitational radiation by considering the process by which data are analyzed in a noisy detector. By constructing the probability that the detector output is consistent with the presence of a signal... |
gr-qc/9812060 | Iosif B. Khriplovich | I.B. Khriplovich | Radiation of Charged Particles by Charged Black Hole | 10 pages, latex, 4 ps-figures | null | 10.1134/1.558889 | null | gr-qc hep-th | null | The probability of a charged particle production by the electric field of a
charged black hole depends essentially on the particle energy. This probability
is found in the nonrelativistic and ultrarelativistic limits. The range of
values for the mass and charge of a black hole is indicated where the discussed
mechani... | [
{
"created": "Thu, 17 Dec 1998 10:30:31 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Khriplovich",
"I. B.",
""
]
] | The probability of a charged particle production by the electric field of a charged black hole depends essentially on the particle energy. This probability is found in the nonrelativistic and ultrarelativistic limits. The range of values for the mass and charge of a black hole is indicated where the discussed mechanism... |
2403.01910 | Luca Cafaro | Luca Cafaro, Jerzy Lewandowski | Status of Birkhoff's theorem in polymerized semiclassical regime of Loop
Quantum Gravity | 13 pages, 3 figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by/4.0/ | The collapse of a spherically symmetric ball of dust has been intensively
studied in Loop Quantum Gravity (LQG). From a quantum theory, it is possible to
recover a semiclassical regime through a polymerization procedure. In this
setting, general solutions to the polymerized Einstein field equations (PEFE)
will be dis... | [
{
"created": "Mon, 4 Mar 2024 10:18:57 GMT",
"version": "v1"
},
{
"created": "Thu, 16 May 2024 10:19:31 GMT",
"version": "v2"
}
] | 2024-05-17 | [
[
"Cafaro",
"Luca",
""
],
[
"Lewandowski",
"Jerzy",
""
]
] | The collapse of a spherically symmetric ball of dust has been intensively studied in Loop Quantum Gravity (LQG). From a quantum theory, it is possible to recover a semiclassical regime through a polymerization procedure. In this setting, general solutions to the polymerized Einstein field equations (PEFE) will be discu... |
2402.04091 | Jo\~ao Lu\'is Rosa | Jo\~ao Lu\'is Rosa, Tom Zlosnik | Sudden cosmological singularities in Aether scalar-tensor theories | 14 pages, 9 figures | Phys. Rev. D 109, 104077 (2024) | 10.1103/PhysRevD.109.104077 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work we analyze the possibility of sudden cosmological singularities,
also known as type-II singularities, in the background of a
Friedmann-Lema\^itre-Robertson-Walker (FLRW) geometry in an extension of
General Relativity (GR) known as Aether scalar-tensor theories (AeST).
Similarly to several scalar-tensor t... | [
{
"created": "Tue, 6 Feb 2024 15:48:08 GMT",
"version": "v1"
}
] | 2024-05-30 | [
[
"Rosa",
"João Luís",
""
],
[
"Zlosnik",
"Tom",
""
]
] | In this work we analyze the possibility of sudden cosmological singularities, also known as type-II singularities, in the background of a Friedmann-Lema\^itre-Robertson-Walker (FLRW) geometry in an extension of General Relativity (GR) known as Aether scalar-tensor theories (AeST). Similarly to several scalar-tensor the... |
gr-qc/9306026 | Alberto Vazquez Saa | Alberto Saa | Gauge fields on Riemann-Cartan space-times | 16 pages, IFUSP/P-1031 | Mod.Phys.Lett. A9 (1994) 971-982 | 10.1142/S0217732394000812 | null | gr-qc | null | Gauge fields are described on an Riemann-Cartan space-time by means of
tensor-valued differential forms and exterior calculus. It is shown that
minimal coupling procedure leads to a gauge invariant theory where gauge fields
interact with torsion, and that consistency conditions for the gauge fields
impose restriction... | [
{
"created": "Tue, 22 Jun 1993 14:18:13 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Saa",
"Alberto",
""
]
] | Gauge fields are described on an Riemann-Cartan space-time by means of tensor-valued differential forms and exterior calculus. It is shown that minimal coupling procedure leads to a gauge invariant theory where gauge fields interact with torsion, and that consistency conditions for the gauge fields impose restrictions ... |
1103.5912 | Th. M. Nieuwenhuizen | Th. M. Nieuwenhuizen | Exact Schwarzschild-de Sitter black holes in a family of massive gravity
models | 4 pages | Phys.Rev.D84:024038,2011 | 10.1103/PhysRevD.84.024038 | null | gr-qc astro-ph.CO hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Schwarzschild-de Sitter and Reissner-Nordstr\"om-de Sitter black hole
metrics appear as exact solutions in the recently formulated massive gravity of
de Rham, Gabadadze and Tolley (dRGT), where the mass term sets the curvature
scale. They occur within a two-parameter family of dGRT mass terms. They show
no trace ... | [
{
"created": "Tue, 29 Mar 2011 17:53:05 GMT",
"version": "v1"
}
] | 2011-08-09 | [
[
"Nieuwenhuizen",
"Th. M.",
""
]
] | The Schwarzschild-de Sitter and Reissner-Nordstr\"om-de Sitter black hole metrics appear as exact solutions in the recently formulated massive gravity of de Rham, Gabadadze and Tolley (dRGT), where the mass term sets the curvature scale. They occur within a two-parameter family of dGRT mass terms. They show no trace of... |
1403.4710 | Jishnu Suresh | Jishnu Suresh, Tharanath R, Nijo Varghese and V C Kuriakose | Thermodynamics and Thermodynamic geometry of Park black hole | 11 pages, 9 figures | Eur. Phys. J. C (2014) 74:2819 | 10.1140/epjc/s10052-014-2819-1 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the thermodynamics and thermodynamic geometry of Park black hole in
Ho\v{r}ava gravity. By incorporating the ideas of differential geometry, we
have investigated the thermodynamics using Weinhold geometry and Ruppeiner
geometry. We have also analyzed it in the context of newly developed
geometrothermodynamic... | [
{
"created": "Wed, 19 Mar 2014 07:07:29 GMT",
"version": "v1"
}
] | 2014-05-05 | [
[
"Suresh",
"Jishnu",
""
],
[
"R",
"Tharanath",
""
],
[
"Varghese",
"Nijo",
""
],
[
"Kuriakose",
"V C",
""
]
] | We study the thermodynamics and thermodynamic geometry of Park black hole in Ho\v{r}ava gravity. By incorporating the ideas of differential geometry, we have investigated the thermodynamics using Weinhold geometry and Ruppeiner geometry. We have also analyzed it in the context of newly developed geometrothermodynamics(... |
gr-qc/0310007 | Antoni Arbona Nadal | A. Arbona | Is a classical Euclidean TOE reasonable? | RevTex4, 36 pages, no figures | null | null | null | gr-qc quant-ph | null | We analyze both the feasibility and reasonableness of a classical Euclidean
Theory of Everything (TOE), which we understand as a TOE based on an Euclidean
space and an absolute time over which deterministic models of particles and
forces are built. The possible axiomatic complexity of a TOE in such a
framework is con... | [
{
"created": "Wed, 1 Oct 2003 22:45:29 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Arbona",
"A.",
""
]
] | We analyze both the feasibility and reasonableness of a classical Euclidean Theory of Everything (TOE), which we understand as a TOE based on an Euclidean space and an absolute time over which deterministic models of particles and forces are built. The possible axiomatic complexity of a TOE in such a framework is consi... |
1308.5675 | Ghulam Abbas | M. Sharif, G. Abbas | Dynamics of Charged Radiating Collapse in Modified Gauss-Bonnet Gravity | 15 pages, no figure, Accepted for publication in Eur. Phys. J. Plus.
arXiv admin note: text overlap with arXiv:1302.1173 | Eur. Phys. J. Plus (2013) 128: 102 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | This paper deals with the dynamics of a shearfree charged radiating collapse
in modified Gauss-Bonnet gravity. The field equations for shearfree spherical
interior geometry of a charged dissipative star are formulated. To study the
dynamical behavior of collapsing matter, we derive the dynamical as well as
transport ... | [
{
"created": "Mon, 26 Aug 2013 07:53:52 GMT",
"version": "v1"
}
] | 2013-09-09 | [
[
"Sharif",
"M.",
""
],
[
"Abbas",
"G.",
""
]
] | This paper deals with the dynamics of a shearfree charged radiating collapse in modified Gauss-Bonnet gravity. The field equations for shearfree spherical interior geometry of a charged dissipative star are formulated. To study the dynamical behavior of collapsing matter, we derive the dynamical as well as transport eq... |
0902.3763 | Giovanni Salesi | G. Salesi and E. Di Grezia | Black hole evaporation within a momentum-dependent metric | null | Phys.Rev.D79:104009,2009 | 10.1103/PhysRevD.79.104009 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate the black hole thermodynamics in a "deformed" relativity
framework where the energy-momentum dispersion law is Lorentz-violating and the
Schwarzchild-like metric is momentum-dependent with a Planckian cut-off. We
obtain net deviations of the basic thermodynamical quantities from the
Hawking-Bekenstein ... | [
{
"created": "Sun, 22 Feb 2009 02:22:27 GMT",
"version": "v1"
},
{
"created": "Sun, 8 Mar 2009 00:53:47 GMT",
"version": "v2"
},
{
"created": "Tue, 19 May 2009 22:43:26 GMT",
"version": "v3"
}
] | 2009-05-22 | [
[
"Salesi",
"G.",
""
],
[
"Di Grezia",
"E.",
""
]
] | We investigate the black hole thermodynamics in a "deformed" relativity framework where the energy-momentum dispersion law is Lorentz-violating and the Schwarzchild-like metric is momentum-dependent with a Planckian cut-off. We obtain net deviations of the basic thermodynamical quantities from the Hawking-Bekenstein pr... |
1807.06554 | Gregory V. Vereshchagin | Suzana Bedi\'c and Gregory Vereshchagin | Probability of inflation in Loop Quantum Cosmology | Accepted for publication in Phys. Rev. D | Phys. Rev. D 99, 043512 (2019) | 10.1103/PhysRevD.99.043512 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We discuss how initial conditions for cosmological evolution can be defined
in Loop Quantum Cosmology with massive scalar field and how the presence of the
bounce influences the probability of inflation in this theory, compared with
General Relativity. The main finding of the paper is existence of an attractor
in the... | [
{
"created": "Tue, 17 Jul 2018 17:03:07 GMT",
"version": "v1"
},
{
"created": "Fri, 25 Jan 2019 09:32:04 GMT",
"version": "v2"
}
] | 2019-02-15 | [
[
"Bedić",
"Suzana",
""
],
[
"Vereshchagin",
"Gregory",
""
]
] | We discuss how initial conditions for cosmological evolution can be defined in Loop Quantum Cosmology with massive scalar field and how the presence of the bounce influences the probability of inflation in this theory, compared with General Relativity. The main finding of the paper is existence of an attractor in the c... |
1112.3078 | Chiao-Hsuan Wang | Pisin Chen and Chiao-Hsuan Wang | Where is hbar Hiding in Entropic Gravity? | 8 pages, 2 figures | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The entropic gravity scenario recently proposed by Erik Verlinde reproduced
the Newton's law of purely classical gravity yet the key assumptions of this
approach all have quantum mechanical origins. This is atypical for emergent
phenomena in physics, where the underlying, more fundamental physics often
reveals itself... | [
{
"created": "Wed, 14 Dec 2011 00:32:51 GMT",
"version": "v1"
},
{
"created": "Mon, 20 Nov 2017 20:25:28 GMT",
"version": "v2"
}
] | 2017-11-22 | [
[
"Chen",
"Pisin",
""
],
[
"Wang",
"Chiao-Hsuan",
""
]
] | The entropic gravity scenario recently proposed by Erik Verlinde reproduced the Newton's law of purely classical gravity yet the key assumptions of this approach all have quantum mechanical origins. This is atypical for emergent phenomena in physics, where the underlying, more fundamental physics often reveals itself a... |
gr-qc/0507050 | Valter Moretti | V. Moretti, N. Pinamonti | Black Hole Horizons and Thermodynamics: A Quantum Approach | 21 pages, revised and published version, title changed | Entropy 12:1833-1854,2010 | 10.3390/e12071833 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We focus on quantization of the metric of a black hole restricted to the
Killing horizon with universal radius $r_0$. After imposing spherical symmetry
and after restriction to the Killing horizon, the metric is quantized employing
the chiral currents formalism. Two ``components of the metric'' are indeed
quantized: ... | [
{
"created": "Tue, 12 Jul 2005 10:02:10 GMT",
"version": "v1"
},
{
"created": "Sat, 24 Jul 2010 08:50:54 GMT",
"version": "v2"
}
] | 2011-04-07 | [
[
"Moretti",
"V.",
""
],
[
"Pinamonti",
"N.",
""
]
] | We focus on quantization of the metric of a black hole restricted to the Killing horizon with universal radius $r_0$. After imposing spherical symmetry and after restriction to the Killing horizon, the metric is quantized employing the chiral currents formalism. Two ``components of the metric'' are indeed quantized: Th... |
gr-qc/0012023 | Sergio Dain | Sergio Dain | Initial data for two Kerr-like black holes | revtex, 5 pages, no figures | Phys.Rev.Lett. 87 (2001) 121102 | 10.1103/PhysRevLett.87.121102 | null | gr-qc | null | We prove the existence of a family of initial data for the Einstein vacuum
equation which can be interpreted as the data for two Kerr-like black holes in
arbitrary location and with spin in arbitrary direction. When the mass
parameter of one of them is zero, this family reduces exactly to the Kerr
initial data. The e... | [
{
"created": "Wed, 6 Dec 2000 09:25:07 GMT",
"version": "v1"
}
] | 2009-10-31 | [
[
"Dain",
"Sergio",
""
]
] | We prove the existence of a family of initial data for the Einstein vacuum equation which can be interpreted as the data for two Kerr-like black holes in arbitrary location and with spin in arbitrary direction. When the mass parameter of one of them is zero, this family reduces exactly to the Kerr initial data. The exi... |
0708.3352 | J. Mark Heinzle | J. Mark Heinzle | Bounds on 2m/r for static perfect fluids | 11 pages | null | null | null | gr-qc | null | For spherically symmetric relativistic perfect fluid models, the well-known
Buchdahl inequality provides the bound $2 M/R \leq 8/9$, where $R$ denotes the
surface radius and $M$ the total mass of a solution. By assuming that the ratio
$p/\rho$ be bounded, where $p$ is the pressure, $\rho$ the density of
solutions, we... | [
{
"created": "Fri, 24 Aug 2007 15:00:00 GMT",
"version": "v1"
}
] | 2007-08-27 | [
[
"Heinzle",
"J. Mark",
""
]
] | For spherically symmetric relativistic perfect fluid models, the well-known Buchdahl inequality provides the bound $2 M/R \leq 8/9$, where $R$ denotes the surface radius and $M$ the total mass of a solution. By assuming that the ratio $p/\rho$ be bounded, where $p$ is the pressure, $\rho$ the density of solutions, we p... |
2001.10683 | Fabi\'an Villalba | Daniel Molano, Fabi\'an Dar\'io Villalba, Leonardo Casta\~neda, Pedro
Bargue\~no | On perturbative constraints for vacuum f(R) gravity | 23 pages, 2 figures. Accepted for publication in Classical and
Quantum Gravity | null | 10.1088/1361-6382/ab8051 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Perturbative techniques are important for modified theories of gravity since
they allow to calculate deviations from General Relativity without recurring to
exact solutions, which can be difficult to find. When applied to models such as
$f(R)$ gravity, these techniques introduce corrections in the field equations
tha... | [
{
"created": "Wed, 29 Jan 2020 03:45:20 GMT",
"version": "v1"
},
{
"created": "Mon, 16 Mar 2020 23:06:38 GMT",
"version": "v2"
}
] | 2020-03-18 | [
[
"Molano",
"Daniel",
""
],
[
"Villalba",
"Fabián Darío",
""
],
[
"Castañeda",
"Leonardo",
""
],
[
"Bargueño",
"Pedro",
""
]
] | Perturbative techniques are important for modified theories of gravity since they allow to calculate deviations from General Relativity without recurring to exact solutions, which can be difficult to find. When applied to models such as $f(R)$ gravity, these techniques introduce corrections in the field equations that ... |
gr-qc/9709014 | Patrick R. Brady | Patrick R. Brady, Chris M. Chambers, and Sergio M. C. V. Goncalves | Phases of massive scalar field collapse | 5 pages, RevTex, 4 postscript figures included using psfig | Phys.Rev.D56:6057-6061,1997 | 10.1103/PhysRevD.56.R6057 | GRP-475 | gr-qc | null | We study critical behavior in the collapse of massive spherically symmetric
scalar fields. We observe two distinct types of phase transition at the
threshold of black hole formation. Type II phase transitions occur when the
radial extent $(\lambda)$ of the initial pulse is less than the Compton
wavelength ($\mu^{-1}$... | [
{
"created": "Sat, 6 Sep 1997 03:38:14 GMT",
"version": "v1"
}
] | 2016-08-31 | [
[
"Brady",
"Patrick R.",
""
],
[
"Chambers",
"Chris M.",
""
],
[
"Goncalves",
"Sergio M. C. V.",
""
]
] | We study critical behavior in the collapse of massive spherically symmetric scalar fields. We observe two distinct types of phase transition at the threshold of black hole formation. Type II phase transitions occur when the radial extent $(\lambda)$ of the initial pulse is less than the Compton wavelength ($\mu^{-1}$) ... |
2309.16461 | Surajit Mandal | Surajit Mandal | Weak Deflection Angle, Hawking Radiation, Greybody Bound and Shadow Cast
for Static Black Hole in the Framework of $f(R)$ Gravity | 49 pages, 16 figures, accepted for publication in Physics of the Dark
Universe (Elsevier) | null | null | null | gr-qc | http://creativecommons.org/licenses/by-sa/4.0/ | In this work, we probe the weak gravitational lensing by a static spherically
symmetric black hole in view of $f(R)$ gravity in the background of the
non-plasma medium (vacuum). We provide a discussion on a light ray in a static
black hole solution in $f(R)$ gravity. To adore this purpose, we find the
Gaussian optica... | [
{
"created": "Thu, 28 Sep 2023 14:10:56 GMT",
"version": "v1"
},
{
"created": "Tue, 31 Oct 2023 14:05:55 GMT",
"version": "v2"
}
] | 2023-11-01 | [
[
"Mandal",
"Surajit",
""
]
] | In this work, we probe the weak gravitational lensing by a static spherically symmetric black hole in view of $f(R)$ gravity in the background of the non-plasma medium (vacuum). We provide a discussion on a light ray in a static black hole solution in $f(R)$ gravity. To adore this purpose, we find the Gaussian optical ... |
gr-qc/9407020 | Tevian Dray | Stuart Boersma and Tevian Dray | Slicing, Threading & Parametric Manifolds | Plain TeX, 18 pages, 5 PostScript figures (psfig) | Gen.Rel.Grav. 27 (1995) 319-339 | 10.1007/BF02109128 | null | gr-qc | null | We present a unified treatment of the slicing (3+1) and threading (1+3)
decompositions of spacetime in terms of foliations. It is well-known how to
decompose the metric and connection in the slicing picture; this is at the
heart of any initial-value problem in general relativity. We describe here the
analogous proble... | [
{
"created": "Fri, 15 Jul 1994 23:37:43 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Boersma",
"Stuart",
""
],
[
"Dray",
"Tevian",
""
]
] | We present a unified treatment of the slicing (3+1) and threading (1+3) decompositions of spacetime in terms of foliations. It is well-known how to decompose the metric and connection in the slicing picture; this is at the heart of any initial-value problem in general relativity. We describe here the analogous problem ... |
1307.6655 | Alberto Garcia-Diaz | Alberto A. Garcia-Diaz | Three dimensional stationary cyclic symmetric Einstein-Maxwell
solutions; black holes | null | Annals of Physics {\bf 324} (2009) 2004-2050 | 10.1016/j.aop.2009.04.004 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | From a general metric for stationary cyclic symmetric gravitational fields
coupled to Maxwell electromagnetic fields within the $(2+1)$-dimensional
gravity the uniqueness of wide families of exact solutions is established,
among them, all uniform electromagnetic solutions possessing electromagnetic
fields with vanish... | [
{
"created": "Thu, 25 Jul 2013 08:04:48 GMT",
"version": "v1"
}
] | 2015-06-16 | [
[
"Garcia-Diaz",
"Alberto A.",
""
]
] | From a general metric for stationary cyclic symmetric gravitational fields coupled to Maxwell electromagnetic fields within the $(2+1)$-dimensional gravity the uniqueness of wide families of exact solutions is established, among them, all uniform electromagnetic solutions possessing electromagnetic fields with vanishin... |
2405.08659 | Armand Coudray | Armand Coudray | Conformal scattering of the wave equation in the Vaidya spacetime | null | null | null | null | gr-qc math-ph math.MP | http://creativecommons.org/licenses/by/4.0/ | We construct the conformal scattering operator for the scalar wave equation
on the Vaidya spacetime using vector field methods. The spacetime we consider
is Schwarzschild, near both past and future timelike infinities, in order to
use existing decay results for the scalar field, ensuring our energy estimates.
These e... | [
{
"created": "Tue, 14 May 2024 14:36:27 GMT",
"version": "v1"
}
] | 2024-05-15 | [
[
"Coudray",
"Armand",
""
]
] | We construct the conformal scattering operator for the scalar wave equation on the Vaidya spacetime using vector field methods. The spacetime we consider is Schwarzschild, near both past and future timelike infinities, in order to use existing decay results for the scalar field, ensuring our energy estimates. These est... |
gr-qc/9909028 | Leonardo Castellani | Leonardo Castellani | Gravity on Finite Groups | LaTeX, 26 pages, 1 figure. Corrected misprints and formula giving
exterior product of n 1-forms. Added note on topological action | Commun.Math.Phys. 218 (2001) 609-632 | 10.1007/s002200100409 | DFTT-44/99 | gr-qc hep-th | null | Gravity theories are constructed on finite groups G. A self-consistent review
of the differential calculi on finite G is given, with some new developments.
The example of a bicovariant differential calculus on the nonabelian finite
group S_3 is treated in detail, and used to build a gravity-like field theory
on S_3.
| [
{
"created": "Tue, 7 Sep 1999 17:55:25 GMT",
"version": "v1"
},
{
"created": "Thu, 6 Jul 2000 16:54:16 GMT",
"version": "v2"
}
] | 2009-10-31 | [
[
"Castellani",
"Leonardo",
""
]
] | Gravity theories are constructed on finite groups G. A self-consistent review of the differential calculi on finite G is given, with some new developments. The example of a bicovariant differential calculus on the nonabelian finite group S_3 is treated in detail, and used to build a gravity-like field theory on S_3. |
gr-qc/0702042 | Jerry B. Griffiths | J. B. Griffiths and J. Podolsky | On the parameters of the Kerr-NUT-(anti-)de Sitter space-time | 4 pages. To appear as a Note in Classical and Quantum Gravity | Class.Quant.Grav.24:1687-1690,2007 | 10.1088/0264-9381/24/6/N02 | null | gr-qc hep-th | null | Different forms of the metric for the Kerr-NUT-(anti-)de Sitter space-time
are being widely used in its extension to higher dimensions. The purpose of
this note is to relate the parameters that are being used to the physical
parameters (mass, rotation, NUT and cosmological constant) in the basic four
dimensional situ... | [
{
"created": "Wed, 7 Feb 2007 14:35:36 GMT",
"version": "v1"
}
] | 2008-11-26 | [
[
"Griffiths",
"J. B.",
""
],
[
"Podolsky",
"J.",
""
]
] | Different forms of the metric for the Kerr-NUT-(anti-)de Sitter space-time are being widely used in its extension to higher dimensions. The purpose of this note is to relate the parameters that are being used to the physical parameters (mass, rotation, NUT and cosmological constant) in the basic four dimensional situat... |
gr-qc/0401017 | Docteur Peter Wolf | Peter Wolf, Michael E. Tobar, Sebastien Bize, Andre Clairon, Andre N.
Luiten, Giorgio Santarelli | Whispering Gallery Resonators and Tests of Lorentz Invariance | 21 pages, 6 figures, accepted for General Relativity and Gravitation
(January, 2004). New version with slight changes following the referee's
suggestions | Gen.Rel.Grav. 36 (2004) 2352-2372 | 10.1023/B:GERG.0000046188.87741.51 | null | gr-qc astro-ph hep-ph | null | The frequencies of a cryogenic sapphire oscillator and a hydrogen maser are
compared to set new constraints on a possible violation of Lorentz invariance.
We give a detailed description of microwave resonators operating in Whispering
Gallery modes and then apply it to derive explicit models for Lorentz violating
effe... | [
{
"created": "Tue, 6 Jan 2004 20:07:49 GMT",
"version": "v1"
},
{
"created": "Tue, 10 Feb 2004 15:28:44 GMT",
"version": "v2"
}
] | 2009-11-10 | [
[
"Wolf",
"Peter",
""
],
[
"Tobar",
"Michael E.",
""
],
[
"Bize",
"Sebastien",
""
],
[
"Clairon",
"Andre",
""
],
[
"Luiten",
"Andre N.",
""
],
[
"Santarelli",
"Giorgio",
""
]
] | The frequencies of a cryogenic sapphire oscillator and a hydrogen maser are compared to set new constraints on a possible violation of Lorentz invariance. We give a detailed description of microwave resonators operating in Whispering Gallery modes and then apply it to derive explicit models for Lorentz violating effect... |
gr-qc/0103022 | Winfried Zimdahl | Winfried Zimdahl (Konstanz) and Alexander B. Balakin (Kazan) | Conformal symmetry and deflationary gas universe | 10 pages, to appear in "Exact Solutions and Scalar Fields in Gravity:
Recent Developments", ed. by A. Macias, J. Cervantes-Cota, and C.
L\"ammerzahl, Kluwer Academic Publishers 2001 | null | 10.1007/0-306-47115-9_23 | null | gr-qc astro-ph hep-ph | null | We describe the ``deflationary'' evolution from an initial de Sitter phase to
a subsequent Friedmann-Lema\^{\i}tre-Robertson-Walker (FLRW) period as a
specific non-equilibrium configuration of a self-interacting gas. The
transition dynamics corresponds to a conformal, timelike symmetry of an
``optical'' metric, chara... | [
{
"created": "Thu, 8 Mar 2001 08:32:28 GMT",
"version": "v1"
}
] | 2015-06-25 | [
[
"Zimdahl",
"Winfried",
"",
"Konstanz"
],
[
"Balakin",
"Alexander B.",
"",
"Kazan"
]
] | We describe the ``deflationary'' evolution from an initial de Sitter phase to a subsequent Friedmann-Lema\^{\i}tre-Robertson-Walker (FLRW) period as a specific non-equilibrium configuration of a self-interacting gas. The transition dynamics corresponds to a conformal, timelike symmetry of an ``optical'' metric, charact... |
2303.01165 | Johannes Kirsch | Johannes Kirsch, David Vasak, Armin van de Venn, J\"urgen Struckmeier | Torsion driving cosmic expansion | 26 pages, 3 figures | null | 10.1140/epjc/s10052-023-11571-2 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study a cosmological model based on the canonical Hamiltonian
transformation theory. Using a linear-quadratic approach for the free
gravitational De Donder-Weyl Hamiltonian $H_\mathrm{Gr}$, the model contains
terms describing a deformation of an AdS spacetime and a fully anti-symmetric
torsion in addition to Einst... | [
{
"created": "Thu, 2 Mar 2023 11:15:07 GMT",
"version": "v1"
}
] | 2023-06-07 | [
[
"Kirsch",
"Johannes",
""
],
[
"Vasak",
"David",
""
],
[
"van de Venn",
"Armin",
""
],
[
"Struckmeier",
"Jürgen",
""
]
] | We study a cosmological model based on the canonical Hamiltonian transformation theory. Using a linear-quadratic approach for the free gravitational De Donder-Weyl Hamiltonian $H_\mathrm{Gr}$, the model contains terms describing a deformation of an AdS spacetime and a fully anti-symmetric torsion in addition to Einstei... |
gr-qc/9306021 | null | Gerhard Rein and Alan D. Rendall | Global existence of classical solutions to the Vlasov-Poisson system in
a three dimensional, cosmological setting | 23 pages, Latex, report # 3 | null | 10.1007/BF00391558 | null | gr-qc | null | The initial value problem for the Vlasov-Poisson system is by now well
understood in the case of an isolated system where, by definition, the
distribution function of the particles as well as the gravitational potential
vanish at spatial infinity. Here we start with homogeneous solutions, which
have a spatially const... | [
{
"created": "Wed, 16 Jun 1993 09:20:00 GMT",
"version": "v1"
}
] | 2009-10-22 | [
[
"Rein",
"Gerhard",
""
],
[
"Rendall",
"Alan D.",
""
]
] | The initial value problem for the Vlasov-Poisson system is by now well understood in the case of an isolated system where, by definition, the distribution function of the particles as well as the gravitational potential vanish at spatial infinity. Here we start with homogeneous solutions, which have a spatially constan... |
0911.5597 | Alexander E. Shalyt-Margolin | A.E.Shalyt-Margolin | Entropy In The Present And Early Universe: New Small Parameters And Dark
Energy Problem | 29 pages, Latex. v.2. Minor correction. | Entropy 12:932-952,2010 | 10.3390/e12040932 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | It is demonstrated that entropy and its density play a significant role in
solving the problem of the vacuum energy density (cosmological constant) of the
Universe and hence the dark energy problem. Taking this in mind, two most
popular models for dark energy - Holographic Dark Energy Model and Agegraphic
Dark Energy... | [
{
"created": "Mon, 30 Nov 2009 09:55:06 GMT",
"version": "v1"
},
{
"created": "Fri, 16 Apr 2010 04:39:26 GMT",
"version": "v2"
}
] | 2011-04-07 | [
[
"Shalyt-Margolin",
"A. E.",
""
]
] | It is demonstrated that entropy and its density play a significant role in solving the problem of the vacuum energy density (cosmological constant) of the Universe and hence the dark energy problem. Taking this in mind, two most popular models for dark energy - Holographic Dark Energy Model and Agegraphic Dark Energy M... |
2207.05907 | Zheng-Wen Long | S. R. Wu, B. Q. Wang, Z. W. Long | Probing Bardeen-Kiselev black hole with cosmological constant caused by
Einstein equations coupled with nonlinear electrodynamics using quasinormal
modes and greybody bounds | null | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this work, we investigate a static and spherically symmetric
Bardeen-Kiselev black hole with cosmological constant which is a solution of
the Einstein-non-linear Maxwell field equations along with a quintessential
field. We compute the quasinormal frequencies for Bardeen-Kiselev black
hole(BH) with cosmological co... | [
{
"created": "Wed, 13 Jul 2022 01:04:26 GMT",
"version": "v1"
},
{
"created": "Thu, 17 Nov 2022 16:49:16 GMT",
"version": "v2"
},
{
"created": "Fri, 28 Apr 2023 07:00:23 GMT",
"version": "v3"
},
{
"created": "Thu, 1 Jun 2023 16:30:25 GMT",
"version": "v4"
}
] | 2023-06-02 | [
[
"Wu",
"S. R.",
""
],
[
"Wang",
"B. Q.",
""
],
[
"Long",
"Z. W.",
""
]
] | In this work, we investigate a static and spherically symmetric Bardeen-Kiselev black hole with cosmological constant which is a solution of the Einstein-non-linear Maxwell field equations along with a quintessential field. We compute the quasinormal frequencies for Bardeen-Kiselev black hole(BH) with cosmological cons... |
1201.2218 | Tiberiu Harko | Tiberiu Harko, Gabriela Mocanu | Stochastic oscillations of general relativistic disks | 10 pages, 8 figures, accepted for publication in MNRAS | Mon. Not. R. Astron. Soc., 421, 3102-3110 (2012) | 10.1111/j.1365-2966.2012.20530.x | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the general relativistic oscillations of thin accretion disks
around compact astrophysical objects interacting with the surrounding medium
through non-gravitational forces. The interaction with the external medium (a
thermal bath) is modeled via a friction force, and a random force,
respectively. The gener... | [
{
"created": "Wed, 11 Jan 2012 02:14:59 GMT",
"version": "v1"
}
] | 2015-06-03 | [
[
"Harko",
"Tiberiu",
""
],
[
"Mocanu",
"Gabriela",
""
]
] | We analyze the general relativistic oscillations of thin accretion disks around compact astrophysical objects interacting with the surrounding medium through non-gravitational forces. The interaction with the external medium (a thermal bath) is modeled via a friction force, and a random force, respectively. The general... |
2301.10275 | Gregory Horndeski PhD | Gregory W. Horndeski | The Multiverse and Cosmic Procreation via Cofinsler Spaces -- or --
Being and Nothingness | 37 pages, no figures | null | null | null | gr-qc | http://creativecommons.org/licenses/by-nc-nd/4.0/ | In this paper I shall consider a scalar-scalar field theory with scalar field
phi on a four-dimensional manifold M, and a Lorentzian Cofinsler function f on
T*M. A particularly simple Lagrangian is chosen to govern this theory, and when
f is chosen to generate FLRW metrics on M the Lagrangian becomes a function of
ph... | [
{
"created": "Tue, 24 Jan 2023 19:16:13 GMT",
"version": "v1"
}
] | 2023-01-26 | [
[
"Horndeski",
"Gregory W.",
""
]
] | In this paper I shall consider a scalar-scalar field theory with scalar field phi on a four-dimensional manifold M, and a Lorentzian Cofinsler function f on T*M. A particularly simple Lagrangian is chosen to govern this theory, and when f is chosen to generate FLRW metrics on M the Lagrangian becomes a function of phi ... |
gr-qc/0001081 | Jose David Sanabria Gomez | Vladimir S. Manko, Eckehard W. Mielke and Jos\'e D. Sanabria-G\'omez | Exact Solution for the Exterior Field of a Rotating Neutron Star | Accepted for publication in Phys. Rev. D as Rapid Communication. 8
pages, 2 eps figures | Phys.Rev.D61:081501,2000 | 10.1103/PhysRevD.61.081501 | null | gr-qc astro-ph | null | A four-parameter class of exact asymptotically flat solutions of the
Einstein-Maxwell equations involving only rational functions is presented. It
is able to describe the exterior field of a slowly or rapidly rotating neutron
star with poloidal magnetic field.
| [
{
"created": "Tue, 25 Jan 2000 17:40:48 GMT",
"version": "v1"
}
] | 2009-12-30 | [
[
"Manko",
"Vladimir S.",
""
],
[
"Mielke",
"Eckehard W.",
""
],
[
"Sanabria-Gómez",
"José D.",
""
]
] | A four-parameter class of exact asymptotically flat solutions of the Einstein-Maxwell equations involving only rational functions is presented. It is able to describe the exterior field of a slowly or rapidly rotating neutron star with poloidal magnetic field. |
1205.0400 | Sylvain Marsat | Luc Blanchet and Sylvain Marsat | Relativistic MOND theory based on the Khronon scalar field | 8 pages, to appear in the Proceedings of the Xth International
Conference on Gravitation, Astrophysics and Cosmology (ICGAC10, Vietnam 2011) | null | null | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate a model of modified gravity recovering the modified Newtonian
dynamics (MOND) in the non-relativistic limit, based on the introduction of a
preferred time foliation violating Lorentz invariance in the weak-field regime.
Lorentz-invariance violation has been studied in the framework of
Einstein-aether t... | [
{
"created": "Wed, 2 May 2012 12:13:04 GMT",
"version": "v1"
}
] | 2012-05-03 | [
[
"Blanchet",
"Luc",
""
],
[
"Marsat",
"Sylvain",
""
]
] | We investigate a model of modified gravity recovering the modified Newtonian dynamics (MOND) in the non-relativistic limit, based on the introduction of a preferred time foliation violating Lorentz invariance in the weak-field regime. Lorentz-invariance violation has been studied in the framework of Einstein-aether the... |
gr-qc/0103023 | Kalashnikov | V. L. Kalashnikov | Introduction to relativistic astrophysics and cosmology through Maple | LaTeX, 124 pages, 34 figures, maple2e.sty, worksheet is accessible on
http://www.geocities.com/optomaplev | null | null | null | gr-qc | null | The basics of the relativistic astrophysics including the celestial mechanics
in weak field, black holes and cosmological models are illustrated and analyzed
by means of Maple 6
| [
{
"created": "Thu, 8 Mar 2001 12:23:00 GMT",
"version": "v1"
}
] | 2007-05-23 | [
[
"Kalashnikov",
"V. L.",
""
]
] | The basics of the relativistic astrophysics including the celestial mechanics in weak field, black holes and cosmological models are illustrated and analyzed by means of Maple 6 |
gr-qc/0604007 | Shintaro Sawayama | Shintaro Sawayama | A new way to solve Wheeler-DeWitt equation including black hole universe | 11 page, 1 figure | null | null | null | gr-qc hep-ph | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | One of the unsolved issues in the quantum gravity comes from the
Wheeler-DeWitt equation, which is second order functional derivative equation.
In this paper, we introduce a new method to solve the Wheeler-DeWitt equation.
Usually one treats the state functional of the space of 3-dimensional metrics,
which do not con... | [
{
"created": "Tue, 4 Apr 2006 00:43:33 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Jul 2006 22:38:45 GMT",
"version": "v2"
},
{
"created": "Sun, 15 Jun 2008 04:43:14 GMT",
"version": "v3"
},
{
"created": "Thu, 27 Nov 2008 03:41:18 GMT",
"version": "v4"
}
] | 2008-11-27 | [
[
"Sawayama",
"Shintaro",
""
]
] | One of the unsolved issues in the quantum gravity comes from the Wheeler-DeWitt equation, which is second order functional derivative equation. In this paper, we introduce a new method to solve the Wheeler-DeWitt equation. Usually one treats the state functional of the space of 3-dimensional metrics, which do not conta... |
2302.14858 | Boris Daszuta | Boris Daszuta | Spectrally-tuned compact finite-difference schemes with domain
decomposition and applications to numerical relativity | null | null | null | null | gr-qc cs.NA math.NA | http://creativecommons.org/licenses/by/4.0/ | Compact finite-difference (FD) schemes specify derivative approximations
implicitly, thus to achieve parallelism with domain-decomposition suitable
partitioning of linear systems is required. Consistent order of accuracy,
dispersion, and dissipation is crucial to maintain in wave propagation problems
such that deform... | [
{
"created": "Tue, 28 Feb 2023 18:57:09 GMT",
"version": "v1"
}
] | 2023-03-01 | [
[
"Daszuta",
"Boris",
""
]
] | Compact finite-difference (FD) schemes specify derivative approximations implicitly, thus to achieve parallelism with domain-decomposition suitable partitioning of linear systems is required. Consistent order of accuracy, dispersion, and dissipation is crucial to maintain in wave propagation problems such that deformat... |
1101.0191 | Shinji Tsujikawa | Shinji Tsujikawa | Modified gravity models of dark energy | 52 pages, 8 figures, a lecture note in the book "Lectures on
Cosmology: Accelerated Expansion of the Universe (Lecture Notes in Physics)"
(published by Springer) | Lect.Notes Phys.800:99-145,2010 | 10.1007/978-3-642-10598-2_3 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We review recent progress of modified gravity models of dark energy--based on
f(R) gravity, scalar-tensor theories, braneworld gravity, Galileon gravity, and
other theories. In f(R) gravity and Brans-Dicke theory it is possible to design
viable models consistent with local gravity constraints under a chameleon
mechan... | [
{
"created": "Fri, 31 Dec 2010 02:50:07 GMT",
"version": "v1"
}
] | 2011-02-01 | [
[
"Tsujikawa",
"Shinji",
""
]
] | We review recent progress of modified gravity models of dark energy--based on f(R) gravity, scalar-tensor theories, braneworld gravity, Galileon gravity, and other theories. In f(R) gravity and Brans-Dicke theory it is possible to design viable models consistent with local gravity constraints under a chameleon mechanis... |
2011.04229 | Daniel Berkowitz | Daniel Berkowitz | Towards Uncovering Generic Effects Of Matter Sources In Anisotropic
Quantum Cosmologies Via Taub Models | 53 pages, 21 figures and Mathematica code in the appendix | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We solve the Wheeler DeWitt equation for the Taub models in closed form when
both a cosmological constant and an electromagnetic field are present. In doing
so, we examine the 'excited states' of the quantum Taub models with the
aforementioned matter sources, and prove the existence of a countably infinite
number of ... | [
{
"created": "Mon, 9 Nov 2020 07:39:19 GMT",
"version": "v1"
}
] | 2020-11-10 | [
[
"Berkowitz",
"Daniel",
""
]
] | We solve the Wheeler DeWitt equation for the Taub models in closed form when both a cosmological constant and an electromagnetic field are present. In doing so, we examine the 'excited states' of the quantum Taub models with the aforementioned matter sources, and prove the existence of a countably infinite number of 'e... |
0706.1820 | Muhammad Sharif | M. Sharif | The Pseudo-Newtonian Force and Potential about a Higher Dimensional
Rotating Black Hole | 11 pages, accepted for publication in Nuovo Cimento B | Nuovo Cim.B122:343-350,2007 | 10.1393/ncb/i2007-10365-y | null | gr-qc | null | In this paper, we study the behavior of the pseudo-Newtonian force and
potential about a higher dimensional rotating black hole. We obtain conditions
for the force character from an attractive to repulsive. We also find the
conditions under which force attains a maximum value. The results of this paper
generalizes th... | [
{
"created": "Wed, 13 Jun 2007 04:50:01 GMT",
"version": "v1"
}
] | 2010-11-11 | [
[
"Sharif",
"M.",
""
]
] | In this paper, we study the behavior of the pseudo-Newtonian force and potential about a higher dimensional rotating black hole. We obtain conditions for the force character from an attractive to repulsive. We also find the conditions under which force attains a maximum value. The results of this paper generalizes the ... |
1906.03146 | Martin Bojowald | Martin Bojowald | Properties of fluctuating states in loop quantum cosmology | 12 pages | Mathematics 7 (2019) 645 | 10.3390/math7070645 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In loop quantum cosmology, the values of volume fluctuations and correlations
determine whether the dynamics of an evolving state exhibits a bounce. Of
particular interest are states that are supported only on either the positive
or the negative part of the spectrum of the Hamiltonian that generates this
evolution. I... | [
{
"created": "Fri, 7 Jun 2019 15:04:09 GMT",
"version": "v1"
}
] | 2020-01-06 | [
[
"Bojowald",
"Martin",
""
]
] | In loop quantum cosmology, the values of volume fluctuations and correlations determine whether the dynamics of an evolving state exhibits a bounce. Of particular interest are states that are supported only on either the positive or the negative part of the spectrum of the Hamiltonian that generates this evolution. It ... |
2007.00214 | Alexandre Le Tiec | Alexandre Le Tiec, Marc Casals | Spinning Black Holes Fall in Love | 7 pages; matches version accepted in Phys. Rev. Lett | Phys. Rev. Lett. 126, 131102 (2021) | 10.1103/PhysRevLett.126.131102 | null | gr-qc astro-ph.HE hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The open question of whether a black hole can become tidally deformed by an
external gravitational field has profound implications for fundamental physics,
astrophysics and gravitational-wave astronomy. Love tensors characterize the
tidal deformability of compact objects such as astrophysical (Kerr) black holes
under... | [
{
"created": "Wed, 1 Jul 2020 03:55:13 GMT",
"version": "v1"
},
{
"created": "Wed, 17 Feb 2021 13:02:14 GMT",
"version": "v2"
}
] | 2021-04-02 | [
[
"Tiec",
"Alexandre Le",
""
],
[
"Casals",
"Marc",
""
]
] | The open question of whether a black hole can become tidally deformed by an external gravitational field has profound implications for fundamental physics, astrophysics and gravitational-wave astronomy. Love tensors characterize the tidal deformability of compact objects such as astrophysical (Kerr) black holes under a... |
0808.2597 | Stephen R. Lau | Stephen R. Lau (1), Harald P. Pfeiffer (2), and Jan S. Hesthaven (1)
((1) Brown, (2) Caltech) | IMEX evolution of scalar fields on curved backgrounds | 28 pages, uses revtex4. Revised in response to referee's report. One
numerical experiment added which incorporates perturbed initial data and
adaptive time-stepping | Commun. Comput. Phys., 6 (2009), pp. 1063-1094 | 10.4208/cicp.2009.v6.p1063 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Inspiral of binary black holes occurs over a time-scale of many orbits, far
longer than the dynamical time-scale of the individual black holes. Explicit
evolutions of a binary system therefore require excessively many time steps to
capture interesting dynamics. We present a strategy to overcome the
Courant-Friedrichs... | [
{
"created": "Tue, 19 Aug 2008 17:56:25 GMT",
"version": "v1"
},
{
"created": "Sat, 27 Jun 2009 20:51:28 GMT",
"version": "v2"
}
] | 2015-05-13 | [
[
"Lau",
"Stephen R.",
"",
"Brown"
],
[
"Pfeiffer",
"Harald P.",
"",
"Caltech"
],
[
"Hesthaven",
"Jan S.",
"",
"Brown"
]
] | Inspiral of binary black holes occurs over a time-scale of many orbits, far longer than the dynamical time-scale of the individual black holes. Explicit evolutions of a binary system therefore require excessively many time steps to capture interesting dynamics. We present a strategy to overcome the Courant-Friedrichs-L... |
2307.00649 | Quentin Baghi | Quentin Baghi, Nikolaos Karnesis, Jean-Baptiste Bayle, Marc
Besan\c{c}on, Henri Inchausp\'e | Uncovering stochastic gravitational-wave backgrounds with LISA | 5 pages, 1 figure, contribution to the 2023 Gravitation session of
the 57th Rencontres de Moriond | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Finding a stochastic gravitational-wave background (SGWB) of astrophysical or
primordial origin is one of the quests of current and future gravitational-wave
observatories. While detector networks such as LIGO-Virgo-Kagra or pulsar
timing arrays can use cross-correlations to tell instrumental noise and SGWB
apart, LI... | [
{
"created": "Sun, 2 Jul 2023 20:00:20 GMT",
"version": "v1"
}
] | 2023-07-04 | [
[
"Baghi",
"Quentin",
""
],
[
"Karnesis",
"Nikolaos",
""
],
[
"Bayle",
"Jean-Baptiste",
""
],
[
"Besançon",
"Marc",
""
],
[
"Inchauspé",
"Henri",
""
]
] | Finding a stochastic gravitational-wave background (SGWB) of astrophysical or primordial origin is one of the quests of current and future gravitational-wave observatories. While detector networks such as LIGO-Virgo-Kagra or pulsar timing arrays can use cross-correlations to tell instrumental noise and SGWB apart, LISA... |
1604.02140 | Mahamat Saleh | Mahamat Saleh, Bouetou Bouetou Thomas and Kofane Timoleon Crepin | Quasinormal modes and Hawking radiation of a Reissner-Nordstr\"om black
hole surrounded by quintessence | 7 pages, 6 figures | Astrophys Space Sci (2011) 333: 449-455 | 10.1007/s10509-011-0643-8 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We investigate quasinormal modes (QNMs) and Hawking radiation of a
Reissner-Nordstr\"om black hole sur-rounded by quintessence. The
Wentzel-Kramers-Brillouin (WKB) method is used to evaluate the QNMs and the
rate of radiation. The results show that due to the interaction of the
quintessence with the background metric... | [
{
"created": "Wed, 6 Apr 2016 20:23:31 GMT",
"version": "v1"
}
] | 2016-04-11 | [
[
"Saleh",
"Mahamat",
""
],
[
"Thomas",
"Bouetou Bouetou",
""
],
[
"Crepin",
"Kofane Timoleon",
""
]
] | We investigate quasinormal modes (QNMs) and Hawking radiation of a Reissner-Nordstr\"om black hole sur-rounded by quintessence. The Wentzel-Kramers-Brillouin (WKB) method is used to evaluate the QNMs and the rate of radiation. The results show that due to the interaction of the quintessence with the background metric, ... |
2308.07100 | William Wolf | William J. Wolf and James Read and Quentin Vigneron | The Non-Relativistic Geometric Trinity of Gravity | Updated version with minor changes | null | null | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The geometric trinity of gravity comprises three distinct formulations of
general relativity: (i) the standard formulation describing gravity in terms of
spacetime curvature, (ii) the teleparallel equivalent of general relativity
describing gravity in terms of spacetime torsion, and (iii) the symmetric
teleparallel e... | [
{
"created": "Mon, 14 Aug 2023 12:24:17 GMT",
"version": "v1"
},
{
"created": "Tue, 15 Aug 2023 02:22:35 GMT",
"version": "v2"
},
{
"created": "Fri, 22 Dec 2023 22:54:30 GMT",
"version": "v3"
},
{
"created": "Sun, 4 Feb 2024 14:46:19 GMT",
"version": "v4"
}
] | 2024-02-06 | [
[
"Wolf",
"William J.",
""
],
[
"Read",
"James",
""
],
[
"Vigneron",
"Quentin",
""
]
] | The geometric trinity of gravity comprises three distinct formulations of general relativity: (i) the standard formulation describing gravity in terms of spacetime curvature, (ii) the teleparallel equivalent of general relativity describing gravity in terms of spacetime torsion, and (iii) the symmetric teleparallel equ... |
0802.4443 | Alexander Silenko | Alexander J. Silenko | Classical and Quantum Spins in Curved Spacetimes | Invited lecture presented at the International conference devoted to
Myron Mathisson: his life, work, and influence on current research. 23 pages | Acta Physica Polonica B Proc. Suppl. 1:87-107,2008 | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | A comparative analysis of the Mathisson-Papapetrou and Pomeransky-Khriplovich
equations is presented. Motion of spinning particles and their spins in
gravitational fields and noninertial frames is considered. The angular velocity
of spin precession defined by the Pomeransky-Khriplovich equations depends on
the choice... | [
{
"created": "Fri, 29 Feb 2008 18:08:47 GMT",
"version": "v1"
}
] | 2008-05-16 | [
[
"Silenko",
"Alexander J.",
""
]
] | A comparative analysis of the Mathisson-Papapetrou and Pomeransky-Khriplovich equations is presented. Motion of spinning particles and their spins in gravitational fields and noninertial frames is considered. The angular velocity of spin precession defined by the Pomeransky-Khriplovich equations depends on the choice o... |
2102.11722 | Gamal G.L. Nashed | G.G.L.Nashed | New rotating AdS/dS black holes in $\mathrm{f(R)}$ gravity | 13 pages, 8 figures. arXiv admin note: text overlap with
arXiv:2012.05711 | Physics Letters B Volume 815, 2021, 136133 | 10.1016/j.physletb.2021.136133 | null | gr-qc hep-th | http://creativecommons.org/licenses/by/4.0/ | It is known that general relativity (GR) theory is not consistent with the
latest observations. The modified gravity of GR known as $\mathrm{f(R)}$ where
$\mathrm{R}$ is the Ricci scalar, is considered to be a good candidate for
dealing with the anomalies present in classical GR. In this context, we study
static rota... | [
{
"created": "Mon, 22 Feb 2021 10:08:34 GMT",
"version": "v1"
}
] | 2021-02-24 | [
[
"Nashed",
"G. G. L.",
""
]
] | It is known that general relativity (GR) theory is not consistent with the latest observations. The modified gravity of GR known as $\mathrm{f(R)}$ where $\mathrm{R}$ is the Ricci scalar, is considered to be a good candidate for dealing with the anomalies present in classical GR. In this context, we study static rotati... |
gr-qc/0601014 | Maciej Dunajski | Maciej Dunajski | Einstein--Maxwell--Dilaton metrics from three--dimensional
Einstein--Weyl structures | 12 pages, to be published in Class.Quantum Grav | Class.Quant.Grav.23:2833-2840,2006 | 10.1088/0264-9381/23/9/004 | DAMTP-2006-3, NI06003-GMR | gr-qc hep-th nlin.SI | null | A class of time dependent solutions to $(3+1)$ Einstein--Maxwell-dilaton
theory with attractive electric force is found from Einstein--Weyl structures
in (2+1) dimensions corresponding to dispersionless Kadomtsev--Petviashvili and
$SU(\infty)$ Toda equations. These solutions are obtained from time--like
Kaluza--Klein... | [
{
"created": "Wed, 4 Jan 2006 15:37:53 GMT",
"version": "v1"
},
{
"created": "Sun, 12 Feb 2006 19:42:31 GMT",
"version": "v2"
}
] | 2014-11-17 | [
[
"Dunajski",
"Maciej",
""
]
] | A class of time dependent solutions to $(3+1)$ Einstein--Maxwell-dilaton theory with attractive electric force is found from Einstein--Weyl structures in (2+1) dimensions corresponding to dispersionless Kadomtsev--Petviashvili and $SU(\infty)$ Toda equations. These solutions are obtained from time--like Kaluza--Klein r... |
1610.09477 | Reza Saffari | Sara Dastan, Reza Saffari and Saheb Soroushfar | Shadow of a Kerr-Sen dilaton-axion Black Hole | 20 pages, 6 figures, 3 tables | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We analyze the shadow of charged stationary axially symmetric space-time
(Kerr-Sen dilaton-axion black hole). This black hole is defined by a mass $M$,
a spin $a$ and $r_{\alpha}=Q^{2}/M$, where $Q$ is the electric charge. Shadows
are investigated in two conditions, i) for an observer at infinity in vacuum
and ii) fo... | [
{
"created": "Sat, 29 Oct 2016 09:11:41 GMT",
"version": "v1"
}
] | 2016-11-01 | [
[
"Dastan",
"Sara",
""
],
[
"Saffari",
"Reza",
""
],
[
"Soroushfar",
"Saheb",
""
]
] | We analyze the shadow of charged stationary axially symmetric space-time (Kerr-Sen dilaton-axion black hole). This black hole is defined by a mass $M$, a spin $a$ and $r_{\alpha}=Q^{2}/M$, where $Q$ is the electric charge. Shadows are investigated in two conditions, i) for an observer at infinity in vacuum and ii) for ... |
2007.09144 | Wei-Chen Lin | Wei-Chen Lin, William H. Kinney | The Trans-Planckian problem in Tachyacoustic Cosmology | 6 pages, 1 figure (v2: new section added.) | null | 10.1088/1475-7516/2021/04/044 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study Tachyacoustic models of cosmology, for which a scale-invariant
perturbation spectrum is generated via superluminal sound speed instead of
accelerated expansion, as in the case of inflation. We derive two bounds on the
size of acoustic horizon which constrain the duration of tachyacoustic
evolution, and there... | [
{
"created": "Thu, 16 Jul 2020 23:26:51 GMT",
"version": "v1"
},
{
"created": "Thu, 24 Sep 2020 19:06:12 GMT",
"version": "v2"
}
] | 2021-04-28 | [
[
"Lin",
"Wei-Chen",
""
],
[
"Kinney",
"William H.",
""
]
] | We study Tachyacoustic models of cosmology, for which a scale-invariant perturbation spectrum is generated via superluminal sound speed instead of accelerated expansion, as in the case of inflation. We derive two bounds on the size of acoustic horizon which constrain the duration of tachyacoustic evolution, and therefo... |
1001.0475 | Saibal Ray | Utpal Mukhopadhyay, Partha Pratim Ghosh and Saibal Ray | Higher Dimensional Dark Energy Investigation with Variable $\Lambda$ and
$G$ | 7 Latex pages with few changes | Int.J.Theor.Phys.49:1622-1627,2010 | 10.1007/s10773-010-0344-z | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Time variable $\Lambda$ and $G$ are studied here under a phenomenological
model of $\Lambda$ through an ($n+2$) dimensional analysis. The relation of
Zeldovich (1968) $|\Lambda| = 8\pi G^2m_p^6/h^4$ between $\Lambda$ and $G$ is
employed here, where $m_p$ is the proton mass and $h$ is Planck's constant. In
the present... | [
{
"created": "Mon, 4 Jan 2010 11:43:03 GMT",
"version": "v1"
}
] | 2014-11-20 | [
[
"Mukhopadhyay",
"Utpal",
""
],
[
"Ghosh",
"Partha Pratim",
""
],
[
"Ray",
"Saibal",
""
]
] | Time variable $\Lambda$ and $G$ are studied here under a phenomenological model of $\Lambda$ through an ($n+2$) dimensional analysis. The relation of Zeldovich (1968) $|\Lambda| = 8\pi G^2m_p^6/h^4$ between $\Lambda$ and $G$ is employed here, where $m_p$ is the proton mass and $h$ is Planck's constant. In the present i... |
1703.00222 | Davood Momeni Dr | Davood Momeni, Sudhaker Upadhyay, Yerlan Myrzakulov, Ratbay Myrzakulov | Cosmic string in gravity's rainbow | accepted in "Astrophys Space Sci" | Astrophys Space Sci (2017) 362:148 | 10.1007/s10509-017-3138-4 | EICTP-17-003 | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper, we study the various cylindrical solutions (cosmic strings) in
gravity's rainbow scenario. In particular, we calculate the gravitational field
equations corresponding to energy-dependent background. Further, we discuss the
possible Kasner, quasi-Kasner and non-Kasner exact solutions of the field
equati... | [
{
"created": "Wed, 1 Mar 2017 10:44:33 GMT",
"version": "v1"
},
{
"created": "Fri, 3 Mar 2017 04:07:28 GMT",
"version": "v2"
},
{
"created": "Sat, 29 Jul 2017 12:53:58 GMT",
"version": "v3"
}
] | 2017-08-03 | [
[
"Momeni",
"Davood",
""
],
[
"Upadhyay",
"Sudhaker",
""
],
[
"Myrzakulov",
"Yerlan",
""
],
[
"Myrzakulov",
"Ratbay",
""
]
] | In this paper, we study the various cylindrical solutions (cosmic strings) in gravity's rainbow scenario. In particular, we calculate the gravitational field equations corresponding to energy-dependent background. Further, we discuss the possible Kasner, quasi-Kasner and non-Kasner exact solutions of the field equation... |
1607.08888 | David Anderson | David Anderson, Nicolas Yunes, Enrico Barausse | The Effect of Cosmological Evolution on Solar System Constraints and on
the Scalarization of Neutron Stars in Massless Scalar-Tensor Theories | 15 pages, 9 figures | Phys. Rev. D 94, 104064 (2016) | 10.1103/PhysRevD.94.104064 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Certain scalar-tensor theories of gravity that generalize
Jordan-Fierz-Brans-Dicke theory are known to predict non-trivial phenomenology
for neutron stars. In these theories, first proposed by Damour and
Esposito-Far\`ese, the scalar field has a standard kinetic term, and couples
conformally to the matter fields. The... | [
{
"created": "Fri, 29 Jul 2016 18:30:19 GMT",
"version": "v1"
}
] | 2016-12-07 | [
[
"Anderson",
"David",
""
],
[
"Yunes",
"Nicolas",
""
],
[
"Barausse",
"Enrico",
""
]
] | Certain scalar-tensor theories of gravity that generalize Jordan-Fierz-Brans-Dicke theory are known to predict non-trivial phenomenology for neutron stars. In these theories, first proposed by Damour and Esposito-Far\`ese, the scalar field has a standard kinetic term, and couples conformally to the matter fields. The w... |
2206.13925 | Jose M. M. Senovilla | Jos\'e M M Senovilla | The influence of Penrose's singularity theorem in General Relativity | 34 pages, 4 figures. Based on my contribution `The 1965 singularity
theorem and its legacy' to the conference "Singularity theorems, causality,
and all that: A tribute to Roger Penrose" (SCRI21), June 14-18, 2021. To
appear in the topical volume `Singularity theorems, causality, and all that
(SCRI21)' https://l... | null | null | null | gr-qc hep-th math-ph math.MP | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Penrose's crucial contributions to General Relativity, symbolized by his 1965
singularity theorem, received (half of) the 2020 Nobel prize in Physics. A
renewed interest in the ideas and implications behind that theorem, its later
developments, and other Penrose's ideas improving our understanding of the
gravitationa... | [
{
"created": "Tue, 28 Jun 2022 11:58:37 GMT",
"version": "v1"
},
{
"created": "Mon, 10 Oct 2022 09:52:57 GMT",
"version": "v2"
}
] | 2022-10-11 | [
[
"Senovilla",
"José M M",
""
]
] | Penrose's crucial contributions to General Relativity, symbolized by his 1965 singularity theorem, received (half of) the 2020 Nobel prize in Physics. A renewed interest in the ideas and implications behind that theorem, its later developments, and other Penrose's ideas improving our understanding of the gravitational ... |
1912.09449 | Juri Smirnov | Marvin L\"uben, Angnis Schmidt-May and Juri Smirnov | Vainshtein Screening in Bimetric Cosmology | Version published in PRD, comments are welcome | Phys. Rev. D 102, 123529 (2020) | 10.1103/PhysRevD.102.123529 | null | gr-qc astro-ph.CO hep-ph hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We demonstrate that the instabilities in linear cosmological perturbations in
bimetric theory are the manifestation of the non-linear Vainshtein mechanism on
an FRW background. The spin-2 mass serves as the cosmological Vainshtein scale
in this case. This allows us to quantitatively address early universe
cosmology. ... | [
{
"created": "Thu, 19 Dec 2019 18:25:08 GMT",
"version": "v1"
},
{
"created": "Thu, 26 Nov 2020 23:33:56 GMT",
"version": "v2"
}
] | 2021-01-04 | [
[
"Lüben",
"Marvin",
""
],
[
"Schmidt-May",
"Angnis",
""
],
[
"Smirnov",
"Juri",
""
]
] | We demonstrate that the instabilities in linear cosmological perturbations in bimetric theory are the manifestation of the non-linear Vainshtein mechanism on an FRW background. The spin-2 mass serves as the cosmological Vainshtein scale in this case. This allows us to quantitatively address early universe cosmology. In... |
2302.04924 | Franco Fiorini | Franco Fiorini | Local symmetries in $f(T)$-like models: lessons from 2D | Contribution to be submitted to the Int. J. Geom. Methods Mod. Phys.
special issue "Metric-Affine Gravity at Tartu" | Int. J. Geom. Methods Mod. Phys. 2350183 (2023) | 10.1142/S0219887823501839 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The comprehension of the intricate structure associated to the local
symmetries encoded in the tetrad field, as well as its physical meaning, is
perhaps the most important unsolved problem within $f(T)$ gravity. This is
inextricably connected to the number, nature and potential impact that the
additional degree/s of ... | [
{
"created": "Thu, 9 Feb 2023 20:41:09 GMT",
"version": "v1"
}
] | 2023-09-14 | [
[
"Fiorini",
"Franco",
""
]
] | The comprehension of the intricate structure associated to the local symmetries encoded in the tetrad field, as well as its physical meaning, is perhaps the most important unsolved problem within $f(T)$ gravity. This is inextricably connected to the number, nature and potential impact that the additional degree/s of fr... |
gr-qc/0411090 | Hing Tong Cho | H. T. Cho and Y.-C. Lin | WKB Analysis of the Scattering of Massive Dirac Fields in Schwarzschild
Black Hole Spacetimes | 21 pages, 8 figures | Class.Quant.Grav. 22 (2005) 775-790 | 10.1088/0264-9381/22/5/001 | null | gr-qc hep-th | null | We analysis the radial equations for massive Dirac fields in Schwarzschild
black hole spacetimes. Different approximation formulae under the WKB scheme
are developed for the transmission probability ${\cal T}$ of the radial
wavefunction with $E^{2}\gg V_{m}$, $E^{2}\approx V_{m}$, and $E^{2}\ll V_{m}$,
where $E$ is t... | [
{
"created": "Thu, 18 Nov 2004 02:08:56 GMT",
"version": "v1"
}
] | 2009-11-10 | [
[
"Cho",
"H. T.",
""
],
[
"Lin",
"Y. -C.",
""
]
] | We analysis the radial equations for massive Dirac fields in Schwarzschild black hole spacetimes. Different approximation formulae under the WKB scheme are developed for the transmission probability ${\cal T}$ of the radial wavefunction with $E^{2}\gg V_{m}$, $E^{2}\approx V_{m}$, and $E^{2}\ll V_{m}$, where $E$ is the... |
gr-qc/9901062 | Dominic Clancy | Dominic Clancy, Alexander Feinstein, James E. Lidsey and Reza Tavakol | Inhomogeneous Einstein-Rosen String Cosmology | Minor extension of concluding section; 18 pages, to appear in
Phys.Rev. D | Phys.Rev. D60 (1999) 043503 | 10.1103/PhysRevD.60.043503 | null | gr-qc hep-th | null | Families of anisotropic and inhomogeneous string cosmologies containing
non-trivial dilaton and axion fields are derived by applying the global
symmetries of the string effective action to a generalized Einstein-Rosen
metric. The models exhibit a two-dimensional group of Abelian isometries. In
particular, two classes... | [
{
"created": "Fri, 22 Jan 1999 19:11:14 GMT",
"version": "v1"
},
{
"created": "Mon, 25 Jan 1999 20:22:42 GMT",
"version": "v2"
},
{
"created": "Thu, 6 May 1999 13:22:45 GMT",
"version": "v3"
}
] | 2009-10-31 | [
[
"Clancy",
"Dominic",
""
],
[
"Feinstein",
"Alexander",
""
],
[
"Lidsey",
"James E.",
""
],
[
"Tavakol",
"Reza",
""
]
] | Families of anisotropic and inhomogeneous string cosmologies containing non-trivial dilaton and axion fields are derived by applying the global symmetries of the string effective action to a generalized Einstein-Rosen metric. The models exhibit a two-dimensional group of Abelian isometries. In particular, two classes o... |
1901.06617 | Shao-Wen Wei | Run Zhou, Shao-Wen Wei | Novel equal area law and analytical charge-electric potential
criticality for charged Anti-de Sitter black holes | 10 pages, 3 figures, structures are re-organized | Phys. Lett. B 792, 406 (2019) | 10.1016/j.physletb.2019.04.010 | null | gr-qc hep-th | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | We study the equal area law and charge-electric potential criticality for the
charged Anti-de Sitter black holes. Considering that the black hole charge is a
double-valued function of the electric potential, we investigate the equal area
law in detail. We find that the equal area law has two different expressions
whe... | [
{
"created": "Sun, 20 Jan 2019 03:14:02 GMT",
"version": "v1"
},
{
"created": "Wed, 29 May 2019 03:01:34 GMT",
"version": "v2"
}
] | 2019-05-30 | [
[
"Zhou",
"Run",
""
],
[
"Wei",
"Shao-Wen",
""
]
] | We study the equal area law and charge-electric potential criticality for the charged Anti-de Sitter black holes. Considering that the black hole charge is a double-valued function of the electric potential, we investigate the equal area law in detail. We find that the equal area law has two different expressions when ... |
1810.10585 | Ian Hinder | Ian Hinder, Serguei Ossokine, Harald P. Pfeiffer, Alessandra Buonanno | Gravitational waveforms for high spin and high mass-ratio binary black
holes: A synergistic use of numerical-relativity codes | 7 pages, 4 figures | Phys. Rev. D 99, 061501 (2019) | 10.1103/PhysRevD.99.061501 | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Observation and characterisation of gravitational waves from binary black
holes requires accurate knowledge of the expected waveforms. The late inspiral
and merger phase of the waveform is obtained through direct numerical
integration of the full 3-dimensional Einstein equations. The Spectral Einstein
Code (SpEC) uti... | [
{
"created": "Wed, 24 Oct 2018 19:38:27 GMT",
"version": "v1"
}
] | 2019-03-27 | [
[
"Hinder",
"Ian",
""
],
[
"Ossokine",
"Serguei",
""
],
[
"Pfeiffer",
"Harald P.",
""
],
[
"Buonanno",
"Alessandra",
""
]
] | Observation and characterisation of gravitational waves from binary black holes requires accurate knowledge of the expected waveforms. The late inspiral and merger phase of the waveform is obtained through direct numerical integration of the full 3-dimensional Einstein equations. The Spectral Einstein Code (SpEC) utili... |
1006.2406 | Carlos Leiva | Carlos Leiva, Ignacio Espinoza | Effective Potential Structure of the BTZ Black Hole in Rainbow Gravity | 6 pages, 2 figures | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | In this paper we study the effective potential structure of the BTZ black
hole in rainbow gravity for a massive and a massless particles.
| [
{
"created": "Fri, 11 Jun 2010 21:25:28 GMT",
"version": "v1"
}
] | 2010-06-15 | [
[
"Leiva",
"Carlos",
""
],
[
"Espinoza",
"Ignacio",
""
]
] | In this paper we study the effective potential structure of the BTZ black hole in rainbow gravity for a massive and a massless particles. |
1907.03606 | J\'er\'emie Francfort | J\'er\'emie Francfort, Basundhara Ghosh and Ruth Durrer | Cosmological Number Counts in Einstein and Jordan frames | 18 pages, 1 figure | null | 10.1088/1475-7516/2019/09/071 | null | gr-qc astro-ph.CO | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | Even though we know that physical observations are frame independent, the
frame dependence of cosmological perturbations is relatively subtle and has led
to confusion in the past. In this paper we show that while the (unobservable)
matter power spectrum is frame dependent, the observable number counts are not.
We sha... | [
{
"created": "Mon, 8 Jul 2019 13:31:34 GMT",
"version": "v1"
}
] | 2019-10-09 | [
[
"Francfort",
"Jérémie",
""
],
[
"Ghosh",
"Basundhara",
""
],
[
"Durrer",
"Ruth",
""
]
] | Even though we know that physical observations are frame independent, the frame dependence of cosmological perturbations is relatively subtle and has led to confusion in the past. In this paper we show that while the (unobservable) matter power spectrum is frame dependent, the observable number counts are not. We shall... |
0906.1769 | Alessandro Nagar | Thibault Damour and Alessandro Nagar | The Effective One Body description of the Two-Body problem | 45 pages, 11 figures. Lecture given at the "School on Mass" (Orleans,
France, June 2008), uses Springer's "svmult.cls" | null | null | null | gr-qc | http://arxiv.org/licenses/nonexclusive-distrib/1.0/ | The Effective One Body (EOB) formalism is an analytical approach which aims
at providing an accurate description of the motion and radiation of coalescing
binary black holes with arbitrary mass ratio. We review the basic elements of
this formalism and discuss its aptitude at providing accurate template
waveforms to b... | [
{
"created": "Tue, 9 Jun 2009 16:04:21 GMT",
"version": "v1"
}
] | 2009-06-10 | [
[
"Damour",
"Thibault",
""
],
[
"Nagar",
"Alessandro",
""
]
] | The Effective One Body (EOB) formalism is an analytical approach which aims at providing an accurate description of the motion and radiation of coalescing binary black holes with arbitrary mass ratio. We review the basic elements of this formalism and discuss its aptitude at providing accurate template waveforms to be ... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.